Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Category
Browse igneous and metamorphic specimens identified by the Rock Identifier community.
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Orthoclase Feldspar with Quartz
Orthoclase (KAlSi3O8)
Garnet
Garnet group species (likely Almandine, Fe3Al2(SiO4)3)
Quartz
Silicon Dioxide (SiO2)
Magnetite / Iron Ore (likely Hematite-Magnetite mix)
Magnetite (Fe3O4)
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Pyrite
Iron Sulfide (FeS2)
Yellow Aventurine (specifically a carved crescent moon)
Silicon Dioxide (SiO2) with inclusions
Orthoclase Feldspar (Sunstone variety)
KAlSi3O8 (Potassium Aluminum Silicate)
Clear Quartz (Tumbled)
Silicon Dioxide (SiO2)
Potassium Feldspar
Orthoclase (KAlSi3O8)
Clear Quartz
Silicon Dioxide (SiO2)
Feldspar (Orthoclase)
Potassium Feldspar (KAlSi3O8)
Sodalite
Sodalite - Na8(Al6Si6O24)Cl2
Quartz Pebble
Silicon Dioxide (SiO2)
Banded Agate
Silicon Dioxide (SiO2)
Quartz (Common or Milky)
Silicon Dioxide (SiO2)
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
Milky Quartz
Silicon Dioxide (SiO2)
Clear Quartz Crystal
Silicon Dioxide (SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Garnet (Pyrope or Almandine)
Silicate (X3Y2Si3O12)
Biotite (Black Mica)
Biotite (K(Mg,Fe++)3AlSi3O10(OH,F)2)
Star Ruby
Corundum (Al2O3 with chromium and rutile inclusions)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Quartz (Milky/Crystalline variety)
Silicon Dioxide (SiO2)
Quartz (Clear Quartz/Rock Crystal)
Silicon Dioxide (SiO2)
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Blue Sapphire (likely costume glass imitation)
Corundum (Al2O3) with iron/titanium impurities
Sodalite
Sodium Aluminum Silicate Chloride (Na8(Al6Si6O24)Cl2)
Pyrite (Iron Pyrites)
Iron Sulfide (FeS2)
Ruby in Matrix
Corundum (Al2O3)
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Quartz (Smoky/Grey variety)
Silicon Dioxide (SiO2)
Quartz (Milky or White Quartz)
Silicon Dioxide (SiO2)
Pyrite
Iron Disulfide (FeS2)
Chalcopyrite
Chalcopyrite (CuFeS2)
Quartz with Muscovite Mica
SiO2 with KAl2(AlSi3O10)(OH)2
Pyrite
Iron Sulfide (FeS2)
Greenstone Pebble
Metabasalt / Greenschist
Quartz-rich rock, possibly milky quartz or quartzite fragment
Quartz (SiO₂), potentially quartzite if metamorphic