Quartz-rich rock, possibly milky quartz or quartzite fragment
Quartz (SiO₂), potentially quartzite if metamorphic
mineral
Category
Metamorphic Or Igneous (Context Dependent)
Browse metamorphic or igneous (context dependent) specimens identified by the Rock Identifier community.
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Mica / Muscovite or Biotite
Phyllosilicate mineral group (e.g., KAl2(AlSi3O10)(OH)2)
mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(F,OH)2)
mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Muscovite Mica
KAl2(AlSi3O10)(F,OH)2
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(OH)2
mineral
Gneiss
Metamorphic Gneiss (High-grade regional metamorphism)
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
mineral
Gneiss (River Cobble)
Gneiss
metamorphic
K2 Stone
Azurite in Granite
igneous
Greenstone
Metabasalt / Chlorite Schist
metamorphic
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Gneiss
Banded Metamorphic Rock (Gneiss)
metamorphic
Serpentine
Serpentine group ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Fe)2O5(OH)4)
metamorphic
Greenstone / Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2) or Actinolitic Schist
metamorphic
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Amphibolite / Biotite Schist
Amphibolite (rich in Hornblende and Plagioclase feldspar)
metamorphic
Gold-bearing Quartz Ore
Auriferous Quartz (SiO2 + Au)
metamorphic
Green Schist
Greenschist (Chlorite Schist)
metamorphic
Pink Garnet (likely Almandine or Rhodolite)
Garnet Group (Fe3Al2(SiO4)3 to Mg3Al2(SiO4)3)
mineral
Greenstone (Epidosite)
Epidosite (Metamorphosed Basalt/Diabase)
metamorphic
Gneiss
Metamorphic Gneiss (High-grade regional metamorphism)
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Gneiss
Gneiss
metamorphic
Green Schist
Greenschist
metamorphic
Mixed Gemstone Bracelet
Mixed natural minerals and rocks (e.g., Rhodonite, Malachite, Sodalite, Rose Quartz, Black Tourmaline, Quartz/Chalcedony variants)
Mineral/Rock assemblage
Garnet (Almandine-Pyrope)
Almandine-Pyrope Mg3Al2(SiO4)3 to Fe3Al2(SiO4)3
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Sodalite (Sunset Sodalite)
Sodalite: Na8(Al6Si6O24)Cl2
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Iridescent schist or phyllite
Micaceous quartz-rich schist/phyllite, likely containing muscovite or chlorite
metamorphic
Quartz (clear quartz/crystal quartz)
Quartz, silicon dioxide (SiO₂), trigonal crystal system
mineral
Green Schist
Greenschist (containing Chlorite, Actinolite, and Epidote)
metamorphic
Greenschist
Greenschist (Chlorite Schist)
metamorphic
Epidote
Epidote (Ca2(Al,Fe)3(SiO4)3(OH))
mineral