Moonstone
Orthoclase (KAlSi3O8)
mineral
Category
Metamorphic Mineral
Browse metamorphic mineral specimens identified by the Rock Identifier community.
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Prehnite
Ca2Al(AlSi3O10)(OH)2
mineral
Quartzite Pebble
Metamorphic Quartzite (SiO2)
metamorphic
Jade
There are two distinct minerals commonly known as Jade: Nephrite (a calcium magnesium silicate - Ca2(Mg,Fe)5Si8O22(OH)2) and Jadeite (a sodium aluminum silicate - NaAlSi2O6). Based on the image showing a typically softer, more fibrous appearance, it is likely Nephrite.
Mineral
Prehnite
Ca2Al(AlSi3O10)(OH)2
mineral
Gneiss
Metamorphic Gneiss (High-grade regional metamorphism)
metamorphic
Reddish-brown crystalline rock, possibly weathered granite or garnet-bearing schist
Indeterminate; likely quartz–feldspar–mica rock with iron oxides, potentially garnet-bearing
metamorphic
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Polished ruby-in-fuchsite (tentative)
Fuchsite mica with corundum (ruby), commonly in quartzite or mica schist
metamorphic
Weathered gneiss
Foliated gneiss, chiefly quartz–feldspar–mica
metamorphic
Galena
Lead Sulfide (PbS)
mineral
Wavellite with Quartz
Al3(PO4)2(OH,F)3 & SiO2
mineral
Lazulite Quartzite
Quartzite with Lazulite (SiO2 with (Mg,Fe)Al2(PO4)2(OH)2)
metamorphic
Yellow Aventurine (Yellow Quartzite)
Silicon Dioxide (SiO2) with inclusions
metamorphic
Quartz Mineral
Silicon Dioxide (SiO2)
mineral
Schist
Mica Schist
metamorphic
Epidote
Epidote (Ca2(Al, Fe)3(SiO4)3(OH))
mineral
Gold Mineral
Native Gold (Au)
mineral
Gneiss
Gneiss (foliated metamorphic rock)
metamorphic
Quartzite Pebble
Metamorphic Quartzite
metamorphic
Quartzite Pebble
Metamorphic Quartzite
metamorphic
Tumbled green aventurine
Quartz (SiO₂), commonly containing fuchsite mica inclusions
mineral
Green Aventurine
Aventurine Quartz (SiO2 + Fuchsite inclusions)
mineral
Chalcopyrite in Quartz matrix
Chalcopyrite (CuFeS2) with secondary Malachite (Cu2CO3(OH)2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Epidote
Epidote (Ca2(Al, Fe)3(SiO4)3(OH))
mineral
Schist (Greenschist / Mica Schist)
Metamorphic rock rich in platy minerals (e.g., Chlorite/Mica schist)
metamorphic
Granitic Gneiss
Gneiss (high-grade metamorphic rock)
metamorphic
Mica Schist
Mica Schist (Quartz-Mica Schist)
metamorphic
Fuchsite
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Rhodonite
Manganese Silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Amazonite
Microcline (K(AlSi3O8))
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Almandine Garnet in Schist
Almandine, Fe3Al2(SiO4)3
metamorphic
Mica (Biotite or Phlogopite variety)
Phyllosilicate (complex mineral formula involving K, Mg, Fe, Al, Si, and O)
mineral
Hypersthene
Hypersthene ((Mg,Fe)SiO₃)
Mineral
Quartz (Pink / Ferruginous)
Silicon Dioxide (SiO2)
mineral
Prehnite
Ca2Al(AlSi3O10)(OH)2
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Microcline Feldspar
KAlSi3O8
mineral
Schist
Metamorphic Rock (Schist)
metamorphic