Image: <bdi><a href="https://www.wikidata.org/wiki/Q56247090" class="extiw" title="d:Q56247090"><span title="mineral collector and dealer">Robert M. Lavinsky</span></a></bdi> (CC BY-SA 3.0)
orthorhombicuncommonSilicates
Topaz
Al₂SiO₄(F,OH)₂
This image displays a well-formed, transparent, amber-colored topaz crystal with distinct facets and a brilliant vitreous luster.
Topaz Physical Properties
Mohs Hardness
8Crystal System
orthorhombicLuster
vitreousStreak Color
whiteCleavage
perfect basal (one direction)Fracture
conchoidalSpecific Gravity
3.49Colors
yellow, amber, brown, blue, pink, green, colorlessTransparency
transparentType Locality
Dassu (Dasso; Dusso), Shigar Valley, Skardu District, Baltistan, PakistanMineral Group
SilicatesUses
jewelry, gemstone, collector's itemAssociated Minerals
quartz, feldspar, mica, beryl, fluorite, cassiteriteRarity
uncommonGeological Context
Topaz typically crystallizes in igneous rocks, especially in granitic pegmatites and rhyolite lava flows, and can also be found in hydrothermal veins and alluvial deposits.
