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 (Nesosilicates)
Topaz
Al2SiO4(F,OH)2
This image displays a large, well-formed, transparent crystal of sherry-colored topaz, exhibiting excellent crystal faces and clarity.
Topaz Physical Properties
Mohs Hardness
8Crystal System
orthorhombicLuster
vitreousStreak Color
whiteCleavage
perfect basal (001)Fracture
conchoidalSpecific Gravity
3.49Colors
sherry, yellow, brown, blue, pink, colorless, greenTransparency
transparentType Locality
Topaz Mountain, Thomas Range, Juab County, Utah, USAMineral Group
Silicates (Nesosilicates)Uses
jewelry, collector specimens, abrasives (less common)Associated Minerals
quartz, feldspar, fluorite, cassiterite, micaRarity
uncommonGeological Context
Topaz typically forms in igneous rocks such as granites and rhyolites, as well as in pegmatites and hydrothermal veins. It is often found in association with tin and fluorine-bearing minerals.
