Crystal Quartz Facts

Crystal Quartz Facts

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Crystal Quartz  Properties

Chemical CompositionIt is Silicon Dioxide the chemical formula is SiO2.
ColoursColourless, White, Gray, Pink, Purple, Brown and Black.
StreakWhite
VarietiesAmethyst, Citrine, Rock crystal, Smoky quartz, Rose quartz, Chalcedony, Agate, Chrysoprase, Sardonyx, Onyx, Carnelian, Flint, Jasper and Bloodstone.
Specific Gravity2.65
Refractive Index1.54-1.55
LusterGlassy to vitreous
Hardness7 Mohs.
Solid StateTransparent to translucent
PleochroismNone
FracturesConchoidal.
Bi-refringence0.009
Crystal SystemTrigonal Crystal System.
CleavageNone
EnhancementNot enhanced
SourceWorld side occurrence. Brazil, USA, UK, Scotland, Russia, Mexico, Germany, Montana, Switzerland and Madagascar.
PrecautionsOnly general gemstone precautions are required.