Black Tourmaline in Quartz
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4) in Silicon Dioxide (SiO2)
Category
Browse granite specimens identified by the Rock Identifier community.
Black Tourmaline in Quartz
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4) in Silicon Dioxide (SiO2)
Muscovite (Mica) in Quartz Matrix
Muscovite (KAl2(AlSi3O10)(OH)2) and Quartz (SiO2)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Aquamarine
Beryl (Be3Al2Si6O18 with iron impurities)
Quartz Vein in Host Rock (often Granite or Schist)
Silicon Dioxide (SiO2) within host matrix
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Beryl (likely var. Aquamarine or Goshenite) in Matrix
Beryllium Aluminum Silicate (Be3Al2Si6O18)
Green Fluorite
Calcium Fluoride (CaF2)
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Banded Gneiss
Gneiss (Metamorphic Rock)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Citrine Quartz
Silicon Dioxide (SiO2)
Gneiss
Gneiss (quartz-feldspar-biotite gneiss)
Smoky Quartz
Silicon Dioxide (SiO2)
Biotite Mica
Biotite, K(Mg,Fe)3AlSi3O10(F,OH)2
Milky Quartz
Silicon Dioxide (SiO2)
Amazonite
Microcline (KAlSi3O8) with Pb impurities
Iolite (Cordierite)
Magnesium Iron Aluminum Silicate (Mg,Fe)2Al4Si5O18
Citrine
Silicon Dioxide (SiO2)
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Rose Quartz
Silicon dioxide (SiO2)
Quartz Pebble
Silicon Dioxide (SiO2)
Aquamarine on Feldspar Matrix
Beryl (Be3Al2Si6O18) with Potassium Feldspar (KAlSi3O8)
Alexandrite in Matrix
Chrysoberyl (BeAl2O4 with Chromium impurities)
Aquamarine
Beryl (Be3Al2Si6O18 with iron impurities)
Lapis Lazuli
Na8[Al6Si6O24]n(S,Cl,SO4,OH)2 (Lazurite component)
Green Tourmaline
Verdelite (Silicate mineral); Na(Li,Al)3Al6(BO3)3Si6O18(OH)4
Rose Quartz
Silicon Dioxide (SiO2)
Black Tourmaline (Schorl)
Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)
Lapis Lazuli
Lapis Lazuli (Rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)
Smoky Quartz
Silicon Dioxide (SiO2)
Yellow Quartz (Citrine Quartz Pebble)
Silicon Dioxide (SiO2)
Muscovite Mica (in Quartz/Feldspar Matrix)
Muscovite - KAl2(AlSi3O10)(OH)2
Milky Quartz
Silicon Dioxide (SiO2)
Rose Quartz Sphere
Silicon Dioxide (SiO2) with traces of titanium, iron, or manganese
Yellow Quartz (Citrine Quartz variety / Ferruginous Quartz)
Silicon Dioxide (SiO2) with iron inclusions
Muscovite Mica
Muscovite KAl2(AlSi3O10)(OH)2
Amazonite
Microcline (K(AlSi3O8))
Smoky Quartz
Smoky Quartz (SiO2)
Emerald
Emerald (Beryl variety); Be3Al2(SiO3)6 with Chromium/Vanadium impurities
Amazonite
K(AlSi3O8) - Lead-bearing Microcline (Tectosilicate)