2017年5月31日星期三

The hardness of natural stone tiles varies such that some of the softer stone tiles are not suitable for very heavy-traffic floor areas

Welcome to our product page of basalt , in which you can find detailed information of basalt . Our basalt is good in quality and competitive in price. We are manufacturer and supplier of basalt . We export basalt . We supply OEM service of basalt for you. We would manufacture basalt following your specific requirement. We are looking forward to your E-mail and establishing cooperative relationship! We would provide professional basalt with good services for you!

A tile is a manufactured piece of hard-wearing material such as ceramic, stone, metal, or even glass, generally used for covering roofs, floors, walls, showers, or other objects such as tabletops. Alternatively, tile can sometimes refer to similar units made from lightweight materials such as perlite, wood, and mineral wool, typically used for wall and ceiling applications. In another sense, a tile is a construction tile or similar object, such as rectangular counters used in playing games. The word is derived from the French word which is meaning a roof tile composed of fired clay.

Tiles are often used to form wall and floor coverings, and can range from simple square tiles to complex mosaics. Tiles are most often made of ceramic, typically glazed for internal uses and unglazed for roofing, but other materials are also commonly used, such as glass, cork, concrete and other composite materials, and stone. Tiling stone is typically marble, onyx, granite or slate. Thinner tiles can be used on walls than on floors, which require more durable surfaces that will resist impacts.

These are commonly made of ceramic or stone, although recent technological advances have resulted in rubber or glass tiles for floors as well. Ceramic tiles may be painted and glazed. Small mosaic tiles may be laid in various patterns. Floor tiles are typically set into mortar consisting of sand, cement and often a latex additive for extra adhesion. The spaces between the tiles are commonly filled with sanded or unsanded floor grout, but traditionally mortar was used.

Natural stone tiles can be beautiful but as a natural product they are less uniform in color and pattern, and require more planning for use and installation. Mass-produced stone tiles are uniform in width and length. Granite or marble tiles are sawn on both sides and then polished or finished on the top surface so that they have a uniform thickness. Other natural stone tiles such as slate are typically "riven" (split) on the top surface so that the thickness of the tile varies slightly from one spot on the tile to another and from one tile to another. Variations in tile thickness can be handled by adjusting the amount of mortar under each part of the tile, by using wide grout lines that "ramp" between different thicknesses, or by using a cold chisel to knock off high spots.

Some stone tiles such as polished granite, marble, and travertine are very slippery when wet. Stone tiles with a riven (split) surface such as slate or with a sawn and then sandblasted or honed surface will be more slip-resistant. Ceramic tiles for use in wet areas can be made more slip-resistant either by using very small tiles so that the grout lines acts as grooves or by imprinting a contour pattern onto the face of the tile.

The hardness of natural stone tiles varies such that some of the softer stone tiles are not suitable for very heavy-traffic floor areas. On the other hand, ceramic tiles typically have a glazed upper surface and when that becomes scratched or pitted the floor looks worn, whereas the same amount of wear on natural stone tiles will not show, or will be less noticeable.
jet balck --flamed

2017年5月26日星期五

Pink marble is formed from limestone, superheated to form its unique crystalline structure

Welcome to our product page of slabs , in which you can find detailed information of slabs . Our slabs is good in quality and competitive in price. We are manufacturer and supplier of slabs . We export slabs . We supply OEM service of slabs for you. We would manufacture slabs following your specific requirement. We are looking forward to your E-mail and establishing cooperative relationship! We would provide professional slabs with good services for you!

Pink marble is formed from limestone, superheated to form its unique crystalline structure. Our marble countertop selection is unmatched with over marble color options and patterns to choose from. Marble countertop surfaces are timeless with their classic beauty and elegance. If you are looking for a surface to sustain through the ages, this natural stone countertop material is perfect for you. Its naturally cool temperature is pleasing for cooking as well as keeping any workspaces temperature controlled.

Pink marble is a metamorphic rock that forms when limestone is subjected to the heat and pressure of metamorphism. It is composed primarily of the mineral calcite and usually contains other minerals, such as clay minerals, micas, quartz, pyrite, iron oxides, and graphite. Under the conditions of metamorphism, the calcite in the limestone recrystallizes to form a rock that is a mass of interlocking calcite crystals. A related rock, dolomitic marble, is produced when dolostone is subjected to heat and pressure.
Pink marble

2017年5月24日星期三

Rust slate is a rare stone used for interior and exterior applications

Rust slate particles in tap water are a common cause of rust stains around bathroom fixtures. Although slate is not a material commonly thought of as becoming stained, it’s not impervious to rust stains. Thankfully, the stains can be removed fairly easily by following the steps below.

Rust slate is a rare stone used for interior and exterior applications. Because of its excellent properties and performance, unique range of earth tone colors and rich texture, architects specify this natural slate for interior slate flooring, exterior paving stone, fireplace surrounds, stair treads and stone wall cladding. Black Lace Rust Slate is available in a natural cleft finish.

The rust slate is multicolored from grey, black, green, yellow and red, it becomes brighter when wet, you can keep this aspect by applying a color enhancing sealer. We select these slates for a higher quality to the level of hardness, wear and resistance to cracking. The natural cleavage surface gives it anti-skid properties.
rust slate

2017年5月22日星期一

Wooden vein marble is the result of metamorphism of a very pure

Wooden vein marble is a metamorphic rock composed of recrystallized carbonate minerals, most commonly calcite or dolomite. Marble may be foliated. Geologists use the term "marble" to refer to metamorphosed limestone; however, stonemasons use the term more broadly to encompass unmetamorphosed limestone. Marble is commonly used for sculpture and as a building material.

Wooden vein marble is a rock resulting from metamorphism of sedimentary carbonate rocks, most commonly limestone or dolomite rock. Metamorphism causes variable recrystallization of the original carbonate mineral grains. The resulting marble rock is typically composed of an interlocking mosaic of carbonate crystals. Primary sedimentary textures and structures of the original carbonate rock (protolith) have typically been modified or destroyed.

Wooden vein marble is the result of metamorphism of a very pure (silicate-poor) limestone or dolomite protolith. The characteristic swirls and veins of many colored marble varieties are usually due to various mineral impurities such as clay, silt, sand, iron oxides, or chert which were originally present as grains or layers in the limestone. Green coloration is often due to serpentine resulting from originally magnesium-rich limestone or dolostone with silica impurities. These various impurities have been mobilized and recrystallized by the intense pressure and heat of the metamorphism.
 wooden vein marble

2017年5月19日星期五

The and any related memorials Tombstone are a focus for mourning and remembrance

We offer our assistance in selecting a Granite monuments, tombstones, headstone and gravestones to commemorate the passing of a loved one,and hand-crafted memorial can be one of the best ways to express your sentiments for eternity. We have our own professional factory , specialized in high quality granite products including headstones, vases, urns, statues for cemetery and grave yard, monthly we export a lot of memorial products to etc.

Explore the widest collection of home decoration and construction products on sale. A home is more than just a house, and decor is more than just furnishings. Home decoration is an art and reveals a lot about the choices and preferences of individuals. You have a huge variety of products to experience with such as European Tombstone listed above and its similar choices: tombstone, granite monument, granite tombstone. Match them with the top quality Chinese European Tombstone factory & manufacturers list and more here. Get a fresh perspective for this Online Shopping industry by learning the newest ideas and trends in house architecture, interior decorating in our trade resources center.

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Owing to soil movement and Downhill creep on gentle slopes, older headstones and footstones can often be found tilted at an angle. Over time, this movement can result in the stones being sited several metres away from their original location.

Graves, and any related memorials Tombstone are a focus for mourning and remembrance. The names of relatives are often added to a gravestone over the years, so that one marker may chronicle the passing of an entire family spread over decades. Since gravestones and a plot in a cemetery or churchyard cost money, they are also a symbol of wealth or prominence in a community. Some gravestones were even commissioned and erected to their own memory by people who were still living, as a testament to their wealth and status. In a Christian context, the very wealthy often erected elaborate memorials within churches rather than having simply external gravestones. Crematoria frequently offer similar alternatives to families who do not have a grave to mark, but who want a focus for their mourning and for remembrance. Carved or cast commemorative plaques inside the crematorium for example may serve this purpose.

European Tombstone

2017年5月17日星期三

White quartz countertop granite in particular has remained a popular choice

Highly durable and effortlessly stylish,  white quartz countertop black granite and quartz worktops are the perfect accompaniment to any sleek, modern kitchen design.

When it comes to designing a sleek, modern kitchen or bathroom, the majority of the tiles, splashbacks and worktops
homeowners invest in are made of granite or quartz.

White quartz countertop granite in particular has remained a popular choice. However, despite its name by no means does 'black granite' mean a completely featureless black finish - there are many styles available including:
Absolute Black - with just a few odd flecks of very dark grey
Star Galaxy and Stargate Cosmos - both of which contain sparkling copper or gold flecks
Grainy, sandy finishes such as the almost grey Impala Blue, Nero Profundo and Porto Branco
The boldly patterned Black Marinace - containing larger fragments of white, grey and even multi-coloured materials

Each and every one of these finishes provides an excellent contrast to the glossy white furniture and sparkling chrome fittings used in so many of today's stylish kitchens. And for the complete look, add in glass or chrome splashbacks and accentuate the granite's sparkling finish with indirect lighting, a kitchen can easily be transformed into a glittering dream.

White quartz countertop are another option - one that has been growing in popularity over the last few years. In contrast to granite (a naturally occurring material), quartz worktops are manmade. A composite material manufactured from around 95 per cent crushed and ground granite and resin, quartz is produced in sheets and cut to size.
As the granite chips and dust that make up quartz countertops is graded according to colour there is a whole universe of  white quartz countertop in varying finishes - these are typically differentiated by the manufacturers who produce them.
 white quartz countertop

2017年5月16日星期二

Sand drop quartz Impressions specialty finishes offer

Welcome to our product page of Quartz , in which you can find detailed information of Quartz . Our Quartz is good in quality and competitive in price. We are manufacturer and supplier of Quartz . We export Quartz . We supply OEM service of Quartz for you. We would manufacture Quartz following your specific requirement. We are looking forward to your E-mail and establishing cooperative relationship! We would provide professional Quartz with good services for you!

Man made Sand drop quartz products are a popular choice for clients looking to balance design and durability. Composed of natural quartz, resin and pigment, man-made quartz stone products are resistant to heat, scratching and acid etching making them an ideal choice for countertops, floors and walls.

Sand drop quartz Impressions specialty finishes offer a rich visual and tactile experience that is certain to create an eye-catching focal point in your home. The softly sparkling beauty of this collection evokes a look of semi-precious stones that tectonic activity has revealed among majestic plateaus and awe-inspiring canyon ridges. Glistening flecks are revealed as your eye follows light reflecting across the surface. Think of it as earthy meets exotic.

Sand drop quartz heat and scratch resistant. Quartz surface is a non-porous material, therefore it will not stain.
Maintenance Free. Due to its physical characteristics, Quartz surface is the only maintenance-free material on the market->.
Multiple Applications. Quartz surface can be fabricated into numerous shapes, making it a desirable alternative to natural stone in homes, businesses, new construction and remodeling projects. It can be used in making tiles, kitchen
Color Scheme. Quartz surface is manufactured using different aggregates and sands
Environmentally Sensitive. Quartz surface is one of the most environmentally sensitive materials for home use. It is composed of 93% natural materials, including recycled glass and recycle Sand drop quartz.
Sand drop quartz

2017年5月15日星期一

This is a question that's commonly asked when homeowners are considering waterjet pattern quartz or granite for their next countertop surface

Waterjet pattern Quartz stone countertops get high marks for both beauty and durability. As a form of engineered stone this type of surfacing combines both the attractiveness and robustness of stone with the benefits that modern technology can bring.

That technology, which includes a resin binder and added colors, gives quartz surfacing benefits that some natural stones don't have. In some ways, it's like getting the best of both worlds.


Waterjet pattern Quartz is a mineral and one of the most abundant on our planet. It's not a "stone" by itself but one of the ingredients that makes up stone. For example, granite is one form of stone that's made up of several minerals, primarily quartz and feldspar.

So when it comes to countertops the quartz variety isn't "solid quartz", but rather, a combination of the waterjet pattern quartz mineral and several other additives. Their makeup is about 93% quartz, with the remainder made up by a resin binder and color additives.

In other words, it's a human-made product. Quartz counters aren't quarried out of the earth and cut into slabs like granite and other stones that are used as kitchen and bath counters. waterjet pattern Quartz countertops are one form of engineered stone countertops (which is probably a misnomer in this case since we just established that quartz isn't a 'stone').

The resin binder makes the whole recipe non-porous. It does this by filling in all the cracks and crevasses between the quartz crystals. What you end up with is a very hard, durable and non-porous work surface. Not to mention the fact that they look real nice too.

Some manufacturers advertise their products as "waterjet pattern quartz"; well, yes, it's natural. But remember that it's natural quartz that's combined with other materials that make up those "natural quartz" countertops. In other words, don't be confused into thinking that it's a slab of quartz that's been taken out of the ground and cut and polished like granite.

The main message you should walk away with here is that quartz countertops are man-made but they're also durable, clean (they don't harbor any evil-doing bacteria) and attractive. All great attributes for any countertop surface.

This is a question that's commonly asked when homeowners are considering waterjet pattern quartz or granite for their next countertop surface. The answer to this question is as variable as the types of stone and quartz you can choose from, and it all depends on the particular type of granite or quartz that you select.
For example, granite countertops can range anywhere from $30 per square foot to over $100 per square foot. Even lower prices are possible with promotions and sales associated with limited color selections.

Waterjet pattern Quartz countertops are no different, with costs stretching across a similar range depending on the particular product you choose.

We believe beauty shouldn’t be bereft of strength. Because it has to survive in your client’s everyday world of spills, burned casseroles, accidents and whatever their child gets into after school. Our waterjet pattern quartz stone offers stunning beauty for any countertop. But more than that, quartz stone offers luxurious hues and tones that are stronger than any other surface on the planet.
waterjet pattern

2017年5月12日星期五

What is the benefit of the discount for the Dark emperator counter top?

The result would be disappointing. In a couple of months you would need to buy the new one.

The discount for the Dark emperator counter top doesn't mean the high quality.

Buy the kitchen countertop when you are satisfied with its design and quality for 100%.

You'll save your time, because you won't need to waste your time searching it again.

You'll save your money, because buying the second cheap countertop plus the old one will cost almost the same as one high quality Dark emperator counter top.

Talk to several managers of the specialized stores.

The person can't know everything about the product that he/she is selling.

As a result, one consultation can result in nothing.

So, for great buy you need to talk to several specialist and get Dark emperator counter top ideas.

Usually, we can't say what exactly do we need and want to buy for kitchen remodeling.

As a result without the thorough research we can miss a great idea that can be hidden in the nearby forum or blog.

So get inspirations from blogs, search engines, images, and online stores.

Online stores have galleries and tips to help you choose the best option.

Buy granite Dark emperator counter top if you want natural, stain resistant and waterproof material.

Granite is unfortunately the most expensive material, but it definitely is worth the price..
Ancient monuments were made of marble, so now you can imagine how strong and durable it is.
Dark emperator counter top

2017年5月10日星期三

Green granite slabs ranite not only adds a touch of elegance to your space

Give your countertops a complete makeover with the stunning look of granite. It typically features rich veining, specks, and other unique characteristics, and comes in a wide range of natural colors. There's little wonder why many think granite is the perfect kitchen work surface, and here are a few more reasons why you should

Stone is one of the oldest building materials. It is appreciated for its longevity and ability to withstand the elements and forces of mankind. At Daltile, we scour quarries around the world to find excellent stone suited for the kitchen or bathroom.

Green granite slabs ranite not only adds a touch of elegance to your space, but it is also a very durable and desirable substance. Each granite slab is unique, so no one else will have the exact same design, and it is sterile and does not trap substances in its surface after it is sealed. Seal granite to ensure long-term quality. Granite is also heat resistant, so you can place hot pans directly on the counter without a potholder. Granite countertop slabs are typically about inches thick, but different thicknesses are available, so you can customize your design. Granite can be finished in a variety of ways, with square, mitered, demi-bullnose, bullnose, and ogee edges, among many others, which can change the whole look of your kitchen. Granite slabs are a beautiful addition to any kitchen or bathroom, and with a large selection of sizes and designs available.
Green granite slabs

2017年5月8日星期一

Where to find the best granite?

As we know kitchen is the basalt stone place to express the imagination of our world. We will have to make sure that we get the best of so as to give the unusual look of the kitchen and the bathroom area. Well, we can say that these are the places in the house where we can explore the ideas and variation in the newest of form. The perfect ambience will be dimmed light, amazing granite or marbled slab and the perfect elegance environment, where we can cook the food or enjoy ,What we can do is choose the perfect material that can make us count on the perfect look of the kitchen.

There are many types of granite and various textures that are used to get the perfect finish. In fact since, these are natural rock, all the design are different except for the pattern that stand common for all the granite and marble. We will have to get hold of the perfect pattern  that will suit the place. When it comes to get the perfect look we will have to delve a bit deeper and push our boundaries to make the changes. Since we know that granite and marble are natural rock we will have to get the perfect patternand in order to get that we will have to look for the perfect shop.

A good shop of zhonglei stone will make sure that they have all types of granites and marbles that can be used as the kitchen and bathroom decorator. However, we will have to keep in mind while searching for the best , that there are many plants in zlxmstone built best are the ones that can provide the similar pattern stone . Therefore, when we are searching for the perfect pattern, we will have to compromise on the expenditure we are planning to make. We will obviously have to spend more. When it comes to getting the perfect look we will have to make sure that we are making the most of the efforts.

Finding the best stone in zlxmstone we will have to get the correct quality. A plant that has vast variety and has the huge stock is bound to be the best one and we will have to look for these dealers, however, we will have to be mentally prepared for the high costing. What we will have to understand is since, granite and marble are natural rock, the uneven finish in the pattern adds to the elegance of the place it is fitted in. Therefore, it is not always necessary to get the perfect pattern of the granite. We will have to search for the perfect look and the natural granites that are more expensive. Granite has been known to keep the home cooler and therefore, is very popular in the places that have seasonal weather.

basalt stone

2017年5月5日星期五

Cultural stone is widely used can be used for new buildings

"Cultural stone" is a collectively. Natural culture of stone from the material can be divided into sedimentary sandstone and hard slate. Artificial stone products are cement, sand, ceramsite and other inorganic pigments through professional processing and special steam curing process made of it with environmental protection and energy saving, light texture, high strength, good resistance to freezing and so on. Generally used for building exterior or interior partial decoration.

Cultural stone, academic name cast stone, is defined as "exquisite building concrete building unit manufacturing, simulation of natural cut stone, for the use of unit masonry."
The cast slabs in the UK and Europe are defined as "made with any material of aggregate and gelling adhesives, which are similar in appearance and can be used in a similar way, natural stone". Cast stone is a masonry product, as a building function, decorated, decorated or facing buildings or other structures, or can be used for garden sketches. The cast stone can be made of white and / or gray cement, finished or natural sand, carefully selected gravel or graded natural gravel and mineral pigments to achieve the desired color and appearance while maintaining durable physical properties over the most Natural cut stone. Cast stone is a good alternative to natural cut limestone, brown gravel, gravel, bluestone, granite, slate, coral, lime and other natural stone.

Is mining in the nature of the stone deposits, of which slate, sandstone, quartz stone, after processing, as a decorative building materials. Natural culture stone material hard, bright color, rich texture, different styles. With compression, wear, fire, cold, corrosion resistance, low water absorption advantages. Natural culture stone is the most important feature of durable, not afraid of dirty, can be unlimited scrub. But the decorative effect of stone by the original texture restrictions, in addition to square stone, the other construction is more difficult, especially when the stitching.
Artificial culture stone
Artificial culture stone is the use of pumice, ceramsite, calcium and other materials from the professional processing and refining, the use of high-tech to the natural formation of each stone texture, color, texture to upgrade the artificial method, the effect is very primitive , Natural, simple charm. High-grade man-made cultural stone with environmental protection and energy saving, light texture, rich colors, non-mildew, non-combustible, good anti-freeze, easy to install and so on.
The classification of cultural stone is generally similar, generally there are stone, bread stone, wall stone, fossil, pebbles, mixed texture stone, antique brick and so on.

Cultural stone is widely used, can be used for new buildings, can be used for renovation of the old buildings, indoor and outdoor can be used, you can produce any models, you can do any color for any models. This is also the reason for selling the nation. Because in the United States designers want to have different colors and stones, artificial stone can change the color and style.
1 Scope
This standard specifies the terminology and definition, classification, naming and marking of requirements for the use of artificial natural stone for architectural decoration, requirements, test methods, inspection rules, marking, packaging, transportation and storage. This standard applies to the Portland cement, lightweight aggregate as the main raw material by casting the finishes decorative materials.
white culture slate

2017年5月4日星期四

Are you already seeing a wide array of benefits of using natural Blue pearl countertop

These variations come by the kind of material used in Blue pearl countertop on a gross scale of natural stone countertops, they are sturdy. Most of them are scratch resistant with some being resistant to oil stains. Certain types of kitchen platforms are also highly durable. These are benefits of different nature! The benefits are provided on different scales by different kinds of natural stone countertops.

Blue pearl countertop made of Quartz - Quartz being the 4th hardest mineral offers inherent natural resistance to any scratch. People use quartz kitchen platforms as they give a very decorative look to the counter. They are also resistant to stains made from juices and oil.

Blue pearl countertop made of soapstone - Soapstone counter are used in instances when the countertops could be exposed to high alkaline and acidic activities. These kitchen platforms are highly resistant to severe variation in the basic nature of some elements in the atmosphere and thus are best suited to be used outdoors.

Blue pearl countertop made of marble - Marble kitchen platforms must be used only in the promise of delicate handling. Remember, marble is the softest of all the minerals used in making counter and using it for heavy duty purpose may perhaps cause damage to the countertop. Marble is good against stains but also need frequent cleaning and sealing.

Blue pearl countertop - Granite is one of the heaviest minerals which are used for making a countertop. Granite is processed into slabs before being used in kitchen platforms. Granite is highly sturdy by nature and has the capacity of withstanding any amount of scratches. If sealed well, granite countertops can also withstand a lot of oil and juice stains.
Apart from these variants, kitchen platforms exported from some countries often have a high degree of durability.

Are you already seeing a wide array of benefits of using natural Blue pearl countertop. It does not mean your home must be filled with several tops. Choose the benefit that best suits for the purpose of the countertop and acquire it. Please be cautious while choosing marble and Blue pearl countertop as they are slightly costly than the others.
Blue pearl countertop

2017年5月3日星期三

have a protective layer between the and the rusty stone pattern

1 rusty stone pattern should be stored vertically on a 150 angle with support at stop and bottom of the steel “A” frame.
2 rusty stone patterns must always be stored in a way that the polished surface is not exposed to the sun. It is necessary to store the slabs in a shaded area, and it is necessary to keep the backside of last slab in each rack is facing out.
3 There should be no more than 20 slabs on each rack. And during storage, the rusty stone pattern should not be face-to-face and back-to- back. The polishing face should always be protected and not touching the metal or the back of another slab, etc. Polished edges should be covered by blankets, carpet or any other type of quality padding for protection.
4 Storage temperatures should not exceed 129°F. Tarpaulins can be used to cover slabs stored under direct sunlight.
5 All racking should have a protective layer between the rack and the rusty stone pattern. This will help to prevent scratching or other damage.
rusty stone pattern

2017年5月1日星期一

What are Sand drop quartz?

Sand drop quartz is a mineral composed of silicon and oxygen atoms in a continuous framework of SiO4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar.

There are many different varieties of Sand drop quartz several of which are semi-precious gemstones. Since antiquity, varieties of quartz have been the most commonly used minerals in the making of jewelry and hardstone carvings, especially in Eurasia.

Sand drop quartz belongs to the trigonal crystal system. The ideal crystal shape is a six-sided prism terminating with six-sided pyramids at each end. In nature quartz crystals are often twinned, distorted, or so intergrown with adjacent crystals of quartz or other minerals as to only show part of this shape, or to lack obvious crystal faces altogether and appear massive. Well-formed crystals typically form in a 'bed' that has unconstrained growth into a void; usually the crystals are attached at the other end to a matrix and only one termination pyramid is present. However, doubly terminated crystals do occur where they develop freely without attachment, for instance within gypsum. A quartz geode is such a situation where the void is approximately spherical in shape, lined with a bed of crystals pointing inward.

Sand drop quartz crystallizes in the trigonal crystal system, space group P3121 and P3221 respectively. β-quartz belongs to the hexagonal system, space group P6222 and P6422, respectively.These space groups are truly chiral (they each belong to the 11 enantiomorphous pairs). Both α-quartz and β-quartz are examples of chiral crystal structures composed of achiral building blocks (SiO4 tetrahedra in the present case). The transformation between α- and β-quartz only involves a comparatively minor rotation of the tetrahedra with respect to one another, without change in the way they are linked.
Sand drop quartz