Tree Agate
Chalcedony (SiO2)
gemstone
Category
Mineral (Metamorphic Pseudomorph)
Browse mineral (metamorphic pseudomorph) specimens identified by the Rock Identifier community.
Learn about Mineral (Metamorphic Pseudomorph) in the encyclopedia
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Hematite
Hematite (Fe2O3)
mineral
Hematite
Iron Oxide (Fe2O3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz with Mica and Feldspar
Granitic Pegmatite Fragment (SiO2 + KAlSi3O8 + KAl2(AlSi3O10)(OH)2)
igneous
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Magnetite (Loadstone candidate)
Iron(II,III) oxide (Fe3O4)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
mineral
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Specular Hematite
Iron(III) oxide (Fe2O3)
mineral
Banded Agate
Cryptocrystalline variety of Quartz (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Aventurine
Silicon Dioxide (SiO2) with inclusions
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Agate
Agate (Silicon Dioxide, SiO2)
mineral
Chrysocolla (on host rock)
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Copper silicate)
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Wavellite
Wavellite (Al3(PO4)2(OH, F)3·5H2O)
mineral
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Greenschist
Greenschist facies metamorphic rock
metamorphic
Mica Schist
Mica Schist (primarily Muscovite and/or Biotite Schist)
metamorphic
Epidotite (Unakite-related)
Epidote-rich rock
metamorphic
Green Aventurine
Quartz (SiO2) with fuchsite inclusions
mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
Mineral
Greenschist (Greenstone)
Greenschist
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz or Calcite Pebble
Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)
mineral
Quartz Vein in Schist
Quartz (SiO2) in Pelitic Schist
metamorphic
Garnet (Almandine variety)
Almandine, Fe3Al2(SiO4)3
Mineral
Gneiss
High-grade Metamorphic Gneiss
metamorphic
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2 + K(Al,Cr)2AlSi3O10(OH)2
mineral