Schist
Schist (Crystalline metamorphic rock)
Category
Browse mineral in metamorphic rock specimens identified by the Rock Identifier community.
Schist
Schist (Crystalline metamorphic rock)
Quartz (Milky Quartz / Quartzite)
Silicon Dioxide (SiO2)
Marble
Metamorphic Limestone (CaCO3)
Biotite (Black Mica)
Biotite - K(Mg,Fe)3(AlSi3O10)(OH)2
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)
Quartz with Mica inclusions (likely Schist or Gneiss host)
Silicon Dioxide (SiO2) with Phyllosilicates (KAl2(AlSi3O10)(OH)2)
Quartz with Muscovite Mica
SiO2 with KAl2(AlSi3O10)(OH)2
Biotite Schist
Biotite Schist (Rich in K(Mg,Fe)3AlSi3O10(OH)2)
Lapis Lazuli (Tumbled Specimen)
Lapis Lazuli (Aggregate rock containing Lazurite: (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2)
Assorted Decorative Tumbled Stones (Quartz, Sodalite, Aventurine, Calcite)
Mixed Silicates and Carbonates (SiO2, Na8(Al6Si6O24)Cl2, CaCO3)
Clear Quartz Crystal
Quartz (Silicon Dioxide, SiO2)
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Schist
Mica Schist
Smoky Quartz
Smoky Quartz (SiO2: Silicon Dioxide)
Gneiss (Metamorphic Rock)
Gneiss
Schist
Mica Schist
Blue Quartz (Aventurine)
Silicon Dioxide (SiO2) with inclusions of crocidolite or dumortierite
Banded Agate (Polished Slice)
Chalcedony (cryptocrystalline Quartz), SiO2
Milky Quartz
Silicon Dioxide (SiO2)
Gneiss
Metamorphic rock of high-grade regional metamorphism
Schist with Quartz Vein
Mica Schist with Crystalline Quartz (SiO2)
Lapis Lazuli
Lapis Lazuli (Rock composed primarily of Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, Calcite, and Pyrite)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
Rough Tanzanite
Zoisite (Ca2Al3(SiO4)3(OH))
Anyolite (Ruby in Zoisite)
Zoisite with inclusions of Hornblende and Ruby (Ca2Al3(SiO4)3(OH))
Milky Quartz
Silicon Dioxide (SiO2)
Granitic Gneiss
Gneiss (Metamorphic rock of granitic composition)
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
Green Aventurine
Silicon dioxide (SiO2) with fuchsite inclusions
Schist
N/A (a rock type, not a mineral formula)
Unakite
Epidotized Granite
Biotite (Mica)
Biotite group (K(Mg,Fe)3AlSi3O10(F,OH)2)
Quartz vein in Host Rock
Crystalline Silicon Dioxide (SiO2) in Lithic Matrix
Milky Quartz
Quartz (Silica / Silicon Dioxide), SiO2
Dyed Quartzite
Metamorphosed Quartz (SiO2) with synthetic pigment
Slate
Foliated Metamorphic Rock (Mainly composed of Quartz, Illite, Chlorite)
Quartzite River Rock
Quartzite (primarily SiO2)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Epidote
Epidote (Ca2(Al,Fe)3(SiO4)3(OH))
Greenschist (Greenstone)
Chlorite Schist / Greenschist Facies Rock
Banded Agate
Chalcedony / Silicon Dioxide (SiO2)