Crystal Quartz Facts
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Crystal Quartz Properties
Chemical Composition | It is Silicon Dioxide the chemical formula is SiO2. |
Colours | Colourless, White, Gray, Pink, Purple, Brown and Black. |
Streak | White |
Varieties | Amethyst, Citrine, Rock crystal, Smoky quartz, Rose quartz, Chalcedony, Agate, Chrysoprase, Sardonyx, Onyx, Carnelian, Flint, Jasper and Bloodstone. |
Specific Gravity | 2.65 |
Refractive Index | 1.54-1.55 |
Luster | Glassy to vitreous |
Hardness | 7 Mohs. |
Solid State | Transparent to translucent |
Pleochroism | None |
Fractures | Conchoidal. |
Bi-refringence | 0.009 |
Crystal System | Trigonal Crystal System. |
Cleavage | None |
Enhancement | Not enhanced |
Source | World side occurrence. Brazil, USA, UK, Scotland, Russia, Mexico, Germany, Montana, Switzerland and Madagascar. |
Precautions | Only general gemstone precautions are required. |