Quartz (Milky or Clear fragment)
Silicon Dioxide (SiO2)
mineral
Category
Mineral (Metamorphic Pseudomorph)
Browse mineral (metamorphic pseudomorph) specimens identified by the Rock Identifier community.
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Garnet
Garnet Group (Silicate mineral); general formula X3Y2(SiO4)3
Mineral
Quartz (Milky/Crystalline fragment)
Silicon Dioxide (SiO2)
mineral
Granitic Gneiss
Gneiss (quartz-feldspar-mica complex)
metamorphic
Pyrite in Matrix (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Tourmaline crystal
Tourmaline Group (Complex Borosilicate)
mineral
Pyrite in Matrix (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Pyrite
Pyrite (Iron Disulfide), FeS2
Mineral
Apatite
Apatite group mineral (e.g., Fluorapatite - Ca5(PO4)3F, Chlorapatite - Ca5(PO4)3Cl, Hydroxylapatite - Ca5(PO4)3(OH))
mineral
Greenschist
Greenschist (chlorite-epidote schist)
metamorphic
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
mineral
Muscovite Mica
Muscovite KAl2(AlSi3O10)(OH)2
mineral
Rough Corundum (Sapphire/Ruby mixture)
Corundum (Aluminum Oxide, Al2O3)
mineral
Gneiss
Banded orthogneiss or paragneiss, typically quartz–feldspar–mica bearing
metamorphic
Fuchsite Gneiss or Schist
Muscovite (variety Fuchsite) within Metamorphic Host Rock
metamorphic
Schist
Mica Schist (Variable chemistry, often rich in muscovite and biotite)
metamorphic
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
metamorphic
Possible weathered mica-rich metamorphic fragment
Mica schist or phyllite (quartz–mica assemblage; identification uncertain from image)
metamorphic
Quartz with Chlorite / Greenschist
Quartz vein in Greenschist (SiO2 with Chlorite group minerals)
metamorphic
Quartz (Pink / Rose Quartz variant)
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Tumbled Grey Agate
Silicon Dioxide (Chalcedony variety), SiO2
mineral
Chrysotile Asbestos
Mg3Si2O5(OH)4
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Potassium Feldspar (Microcline / Orthoclase)
KAlSi3O8
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Rhodochrosite
Rhodochrosite, Manganese Carbonate (MnCO3)
mineral
Quartz pebble / River stone
SiO2 (Silicon Dioxide)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Emerald
Beryl (Be3Al2(SiO3)6) with chromium/vanadium impurities
mineral
Blue Quartzite (Aventurine)
Quartzite (primarily SiO2) with inclusions of Dumortierite or Magnesio-riebeckite
metamorphic
White Quartz
Silicon Dioxide (SiO2)
mineral
Mica Schist
Mica Schist (predominantly Muscovite or Biotite series)
metamorphic
Chalcopyrite (Peacock Ore)
Chalcopyrite (CuFeS2) with Bornite (Cu5FeS4) oxidation
mineral
Schist
Metamorphic Schist
metamorphic
Gneiss (specifically Granitic Gneiss)
Gneiss (composed primarily of Quartz, Feldspar, and Biotite/Amphibole)
metamorphic
Polished pink-and-black granite or gneiss
Granite–gneiss, chiefly quartz, feldspar, and biotite/amphibole
igneous
Quartz with Schist/Mica Inclusions
Crystalline Silicon Dioxide (SiO2) with Phyllosilicates
metamorphic
Tumbled Mixed Gemstones and Rocks
Various mineral species including quartz (SiO2) and silicate minerals
mineral
Schist (likely Mica Schist)
Mica Schist
metamorphic
River Pebble (Gneiss/Schist mix)
Metamorphic rock aggregate
metamorphic
Common Opal
SiO2·nH2O (Hydrated Silicon Dioxide)
mineraloid