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trigonaluncommonSilicates
Quartz
SiO2
A polished specimen of transparent to translucent quartz, prominently featuring needle-like inclusions of black and reddish-brown rutile, enhancing its visual appeal.
Quartz Physical Properties
Mohs Hardness
7Crystal System
trigonalLuster
vitreousStreak Color
whiteCleavage
noneFracture
conchoidalSpecific Gravity
2.65Colors
colorless, white, black, reddish-brownTransparency
transparentType Locality
Vakinankaratra Region, MadagascarMineral Group
SilicatesUses
jewelry, collectorAssociated Minerals
rutile, schorlRarity
uncommonGeological Context
Quartz is a ubiquitous rock-forming mineral found in various geological settings including igneous, metamorphic, and sedimentary rocks. Rutilated quartz forms when rutile needles crystallize within the growing quartz crystal, typically in hydrothermal veins or pegmatites.
