Quartz
Silicon Dioxide (SiO2)
mineral
Category
Metamorphic And Igneous Rocks
Browse metamorphic and igneous rocks specimens identified by the Rock Identifier community.
Learn about Metamorphic And Igneous Rocks in the encyclopedia
View all →
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gold
Native Gold (Au)
mineral
Actinolite
Ca2(Mg,Fe)5Si8O22(OH)2
mineral
Biotite Mica (or Tourmaline fragment)
K(Mg,Fe)3AlSi3O10(F,OH)2
mineral
Sapphire
Corundum (Al2O3)
gemstone
Feldspar
KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8 (Feldspar group)
mineral
Potassium Feldspar (Orthoclase / Microcline)
KAlSi3O8
mineral
Blue Sapphire
Corundum (Al2O3 with trace amounts of Fe and Ti)
gemstone
Hypersthene
Hypersthene (Magnesium Iron Silicate - (Mg,Fe)SiO3)
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Bornite
Bornite (Cu5FeS4)
mineral
Polished garnet bead (likely almandine)
Almandine garnet, Fe₃Al₂(SiO₄)₃ (tentative visual identification)
gemstone
Mica (Muscovite / Phlogopite with Iridescence)
Phyllosilicate group (KAl2(AlSi3O10)(F,OH)2)
mineral
Labradorite
(Na,Ca)(Al,Si)4O8
mineral
Garnet
Garnet Group (Silicate Minerals), formula varies e.g., Alm: Fe3Al2(SiO4)3
mineral
Magnetite (or Magnetic Iron Ore)
Magnetite (Fe3O4)
mineral
Pyrite in Matrix
Iron Sulfide (FeS2)
mineral
Garnet (Almandine)
Almandine Garnet (Fe3Al2(SiO4)3)
gemstone
Hypersthene
Hypersthene ((Mg,Fe)SiO₃)
Mineral
Biotite on Quartz
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2) and Quartz (SiO2)
mineral
Almandine Garnet in Matrix or Tumbled Garnet
Iron Aluminum Silicate, Fe3Al2(SiO4)3
mineral
Muscovite
Muscovite mica, KAl2(AlSi3O10)(OH)2
mineral
Almandine Garnet
Fe3Al2(SiO4)3
gemstone
Epidote-bearing Rock
Epidote / Silicate mineral aggregate
metamorphic
Almandine Garnet
Fe3Al2(SiO4)3
mineral
Muscovite Mica
KAl2(AlSi3O10)(OH)2
mineral
Garnet (Almandine/Pyrope series)
Silicate mineral (Almandine: Fe3Al2Si3O12; Pyrope: Mg3Al2Si3O12)
mineral
Clear Quartz Point
Silicon Dioxide (SiO2)
mineral
Red Garnet (likely Almandine or Pyrope)
Garnet group: X3Y2(SiO4)3 (e.g., Almandine: Fe3Al2Si3O12)
mineral
Magnetite Ore
Magnetite (Fe3O4)
mineral
Magnetite
Magnetite (Fe3O4)
mineral
Migmatite
Migmatite (Mixed metamorphic-igneous rock)
metamorphic
Black Spinel
Magnesium aluminate, MgAl2O4
gemstone
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Almandine Garnet
Fe3Al2(SiO4)3
gemstone
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Citrine
Silicon dioxide (Quartz variety), SiO2
mineral
Quartz
Silicon Dioxide (SiO2)
mineral