Image: <bdi><a href="https://www.wikidata.org/wiki/Q108103612" class="extiw" title="d:Q108103612"><span title="Wikipedian and OpenStreetMap mapper from Cologne, Open Data activist">Raimond Spekking</span></a></bdi> (CC BY-SA 4.0)
trigonaluncommonsilicates
Dioptase
CuSiO2(OH)2
This specimen features vibrant emerald-green, well-formed prismatic crystals of dioptase, often terminated and exhibiting a glassy luster.
Dioptase Physical Properties
Mohs Hardness
5Crystal System
trigonalLuster
vitreousStreak Color
greenCleavage
perfect on {1011}Fracture
conchoidalSpecific Gravity
3.28Colors
emerald green, dark greenTransparency
transparentType Locality
Reneville, KongoMineral Group
silicatesUses
jewelry, collectorAssociated Minerals
calcite, malachite, chrysocolla, quartz, limoniteRarity
uncommonGeological Context
Dioptase is a secondary mineral found in the oxidized zones of copper sulfide deposits, typically forming in arid climates where copper-rich solutions interact with silica-bearing rocks.
