Greenstone
Metabasalt / Greenschist facies rock
Metamorphic
Category
Metamorphic Rock
Browse metamorphic rock specimens identified by the Rock Identifier community.
Learn about Metamorphic Rock in the encyclopedia
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Quartzite with Calcite Accretion
Metamorphosed Quartz Sandstone (SiO2 with CaCO3 coating)
metamorphic
Unakite
Epidotized Granite (Composed of Orthoclase Feldspar, Epidote, and Quartz)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite Pebble
Metamorphic Quartzite (SiO2)
metamorphic
Serpentine
Antigorite-Lizardite-Chrysotile (Mg3Si2O5(OH)4)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Unakite
Unakite (Epidotized Granite)
metamorphic
Unakite
Unakite (Epidotized Granite)
metamorphic
Schist
Mica Schist
metamorphic
Quartzite (River Pebble)
Recrystallized Quartz (SiO2)
metamorphic
Glaucophane Schist (Blueschist)
Blueschist (Glaucophane-bearing schist)
metamorphic
Banded Agate
Chalcedony / Silicon Dioxide (SiO2)
mineral
Tiger's Eye
Silicon dioxide (SiO2) - Pseudomorph after crocidolite
mineral
Biotite Schist
Biotite Schist (Rich in K(Mg,Fe)3AlSi3O10(OH)2)
metamorphic
Riverstone (Quartzite or Siltstone cobble)
Quartzite (primarily SiO2)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite in Shale
Iron Sulfide (FeS2)
mineral
Quartz Vein in Host Rock (often Granite or Schist)
Silicon Dioxide (SiO2) within host matrix
mineral with metamorphic or igneous host
Gold-bearing Quartz Vein in Mafic Rock
Hydrothermal Quartz Vein within Greenschist/Amphibolite facies (SiO2 with Au)
metamorphic
Mica Schist
Mica Schist (primarily Muscovite and Quartz)
metamorphic
Eclogite
Eclogite (Omphacite-Garnet rock)
metamorphic
Biotite (Black Mica)
Biotite - K(Mg,Fe)3(AlSi3O10)(OH)2
mineral
Quartzite Pebbles (Sugar Quartz)
Metamorphic Quartzite (SiO2)
metamorphic
Quartzite
Metamorphic Quartz (SiO2)
metamorphic
Serpentine
Serpentinite (Mg, Fe, Ni)3Si2O5(OH)4
metamorphic
Quartz Druze on Matrix
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Quartz with impurities or Host Rock
SiO2 (Silicon Dioxide) with mixed silicates
mineral
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Serpentine
Serpentinite (group of minerals based on (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)
metamorphic
Quartz Vein / Milky Quartz
Silicon Dioxide (SiO2)
mineral
Blue Quartz (Aventurine)
Silicon Dioxide (SiO2) with inclusions of crocidolite or dumortierite
mineral
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Milky Quartz with Country Rock contact
Silicon Dioxide (SiO2) in contact with Metamorphic/Igneous rock
mineral
Unakite
Epidotized Granite
metamorphic
Unakite
Epidotized Granite
metamorphic
Quartzite Pebble
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartzite pebble
Quartzite (composed primarily of Quartz, SiO2)
metamorphic
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)
metamorphic