Black Tourmaline in Quartz Matrix
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4) with Quartz (SiO2)
Category
Browse mineral (impactite) specimens identified by the Rock Identifier community.
Black Tourmaline in Quartz Matrix
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4) with Quartz (SiO2)
Quartz
Silicon Dioxide (SiO2)
Fuchsite
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
Larimar
Pectolite [NaCa2Si3O8(OH)] with copper substitution
Rose Quartz
Silicon Dioxide (SiO2) with trace elements of titanium, iron, or manganese
Smoky Quartz
Silicon Dioxide (SiO2)
Moss Agate
Chalcedony (SiO2) with dendritic inclusions of Manganese or Iron oxide
Hematite
Hematite (Fe2O3)
Blue Chalcedony
Microcrystalline Quartz (SiO2)
Chalcedony (Common Opal or Agate variant)
Silicon Dioxide (SiO₂)
Desert Rose
Gypsum (CaSO4·2H2O) or Baryte (BaSO4) with trapped sand grains
Satin Spar (Selenite)
Gypsum (CaSO4·2H2O)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Smoky Quartz (with inclusions)
Silicon Dioxide (SiO2)
Emerald
Emerald (Beryl variety); Be3Al2(SiO3)6 with Chromium/Vanadium impurities
Quartz Druze on Matrix
Silicon Dioxide (SiO2)
Botryoidal Malachite
Malachite - Cu2CO3(OH)2
Milky Quartz
Silicon dioxide (SiO2)
Aquamarine
Beryl (Be₃Al₂Si₆O₁₈)
Pyrite in Shale
Iron Disulfide (FeS2)
Opal
Hydrated amorphous form of silica (SiO2·nH2O)
Lepidolite
Lepidolite - K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
Rose Quartz
Silicon dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Sodalite
Sodalite: Na8(Al6Si6O24)Cl2
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium and/or Vanadium impurities
Blue Chalcedony
Silicon Dioxide (SiO2)
Malachite
Malachite (Cu2CO3(OH)2)
Raw Emerald
Beryl (Be3Al2Si6O18 with Chromium/Vanadium)
Precious Opal
Hydrated Silica (SiO2·nH2O)
Orbicular Jasper (Ocean Jasper)
Silicon Dioxide (SiO2) with iron and magnesium inclusions
Sodalite
Na8(Al6Si6O24)Cl2 (Sodium Aluminum Silicate Chloride)
Smoky Quartz
Silicon Dioxide (SiO2)
Clear Quartz Crystal Cluster
Silicon Dioxide (SiO2)
Smoky Quartz and Pyrite Cluster
Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)
Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
Prehnite
Prehnite - Ca2Al(AlSi3O10)(OH)2
Chalcedony (specifically Blue Chalcedony or Common Opal variety)
Silicon Dioxide (SiO₂)
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
Larimar
Pectolite (a variety of pectolite, NaCa2Si3O8(OH))
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Amethyst
Amethyst (Silicon Dioxide - SiO2 with ferric iron impurities)
Greenstone / Serpentinite
Serpentinite (composed primarily of minerals from the serpentine group Mg3Si2O5(OH)4)