Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Category
Crystal
Browse crystal specimens identified by the Rock Identifier community.
Selenite (Giant Crystals)
Selenite (CaSO4·2H2O)
mineral
Desert Rose
Baryte or Gypsum variation (CaSO4·2H2O or BaSO4)
mineral
Emerald in Matrix
Beryllium Aluminum Silicate (Be3Al2(SiO3)6) with Chromium/Vanadium
gemstone
Raw Emerald (Emerald Beryl)
Beryl (Be3Al2Si6O18) with chromium/vanadium impurities
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Aquamarine
Beryl (Be3Al2Si6O18 with Fe2+ impurities)
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Aquamarine
Beryl (Be₃Al₂Si₆O₁₈)
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Aquamarine
Beryl (Be3Al2Si6O18 with Fe2+ impurities)
mineral
Blue kyanite crystal
Kyanite, Al₂SiO₅
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal) Bracelet
Silicon Dioxide (SiO2)
gemstone
Quartz Crystal on Matrix
Silicon Dioxide (SiO2)
mineral
Bicolor tourmaline crystal
Elbaite tourmaline, Na(Li₁.₅Al₁.₅)Al₆(BO₃)₃Si₆O₁₈(OH)₄
mineral
Amethyst (rough crystal)
Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron impurities and irradiation
gemstone
Quartz Crystal Matrix
Silicon Dioxide (SiO2)
mineral
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Selenite (gypsum) crystal
Gypsum, CaSO₄·2H₂O; transparent/white variety called selenite
mineral
Tangerine Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite coatings
mineral
Heliodor (Yellow Beryl) / Greenish-Yellow Beryl
Beryl (Be3Al2Si6O18)
mineral
Clear Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Herkimer Diamond in Matrix
Quartz (SiO2) in Dolostone (CaMg(CO3)2)
sedimentary (host) / mineral (crystals)
Raw aquamarine (likely beryl)
Beryl, Be₃Al₂Si₆O₁₈; blue color from iron impurities
mineral
Aquamarine (Beryl)
Beryllium Aluminum Silicate - Be3Al2Si6O18
gemstone
Aquamarine
Beryl (Be3Al2Si6O18 with trace Fe2+)
Mineral
Emerald in Matrix (Quartz/Calcite)
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Strawberry Quartz
Quartz with Hematite inclusions (SiO2 + Fe2O3)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral