2017年6月6日星期二

Black counter top quartz which often mimics granite or marble

Black counter top quartz which often mimics granite or marble, is a mix of mineral, color, and resin, offering beauty and toughness in a vast array of colors and patterns. It’s also one of the hardest materials in the world, making it a perfect choice for busy kitchens. If you’re considering quartz, here are some other features and characteristics to .

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.

quartz, traditionally called rock crystal or clear quartz, is colorless and transparent or translucent, and has often been used for hardstone carvings, such as the Crystal. Common colored varieties include citrine, rose quartz, amethyst, smoky quartz, milky quartz, and others.

The most important distinction between types of quartz is that of macrocrystalline and the microcrystalline or cryptocrystalline varieties. The cryptocrystalline varieties are either translucent or mostly opaque, while the transparent varieties tend to be macrocrystalline. Chalcedony is a cryptocrystalline form of silica consisting of fine intergrowths of both quartz, and its monoclinic polymorph moganite.Other opaque gemstone varieties of quartz, or mixed rocks including quartz.
 black counter top quartz

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