Feldspar
Aluminosilicate (KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8)
mineral
Category
Metamorphic And Igneous Rocks
Browse metamorphic and igneous rocks specimens identified by the Rock Identifier community.
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Quartz
Silicon Dioxide (SiO2)
mineral
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Quartz Sand Grain
Silicon Dioxide (SiO2)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Agate
Silicon Dioxide (SiO2)
gemstone
Quartz pebble
Silicon dioxide (SiO2)
mineral
Clear Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Moonstone
Orthoclase feldspar (KAlSi3O8)
gemstone
Quartz pebble
Silicon dioxide (SiO2)
mineral
White Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon dioxide (SiO2)
mineral
Clear Quartz (Faceted)
SiO2 - Silicon Dioxide
gemstone
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz / Feldspar Specimen
SiO2 (Quartz) / KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8 (Feldspar Group)
mineral
Black Tourmaline (Schorl)
NaFe3+3Al6(BO3)3Si6O18(OH)4
mineral
Quartz Crystal Rock
Silicon Dioxide (SiO2)
mineral
Agate
Silicon Dioxide (Chalcedony), SiO2
gemstone
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Magnetite / Iron Ore
Magnetite (Fe3O4)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Sunstone
Oligoclase feldspar (Na,Ca)(Al,Si)4O8
gemstone
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Raw Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral
Labradorite
Plagioclase Feldspar ((Ca, Na)(Al, Si)4O8)
mineral
Tumbled Sunstone
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8
gemstone
Gravel / Crushed Stone
Aggregate (mixed mineral rock fragments)
sedimentary
Fuchsite in Quartz (or Emerald in Fuchsite / Verdite)
Chromian Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2) in Quartz Matrix
metamorphic
Pyrite
Iron Pyrite (FeS2)
mineral
Mica (Biotite or Phlogopite Buchsam)
Silicate Mineral (Phyllosilicate family)
mineral
White Quartz Pendant
Silicon Dioxide (SiO2)
mineral
Sunstone
Feldspar group (Plagioclase / Oligoclase)
mineral
Moonstone
Orthoclase (Potassium Feldspar), (K,Na)AlSi3O8
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Citrine
Silicon Dioxide (SiO2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Magnetite (Octahedral Crystal)
Magnetite (Fe3O4)
mineral
Magnetite
Magnetite (Fe3O4)
mineral
Schist
Schist (metamorphic rock)
metamorphic
White Quartz
Silicon Dioxide (SiO2)
mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Faceted red garnet
Garnet group, likely almandine (Fe₃Al₂(SiO₄)₃)
gemstone