Schist
Lepidoblastic Mica Schist
metamorphic
Category
Metamorphic Rock (For Nephrite And Some Jadeite); Mineral (For Jadeite)
Browse metamorphic rock (for nephrite and some jadeite); mineral (for jadeite) specimens identified by the Rock Identifier community.
Learn about Metamorphic Rock (For Nephrite And Some Jadeite); Mineral (For Jadeite) in the encyclopedia
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Gneiss (Metamorphic Rock Pebble)
Foliated Metamorphic Rock (Quartz-Feldspar Gneiss / Granitic Gneiss)
metamorphic
Tumbled green aventurine
Quartzite dominated by quartz (SiO₂), with green fuchsite mica inclusions
mineral
Faceted gemstones, likely mixed small sapphires or spinel
Corundum (Al₂O₃) or spinel (MgAl₂O₄); exact identification requires testing
gemstone
Gneiss
Gneiss
metamorphic
Granite Gneiss
Felsic Gneiss
metamorphic
Granite Gneiss
Gneiss (derived from granitic protolith)
metamorphic
Gneiss (specifically Biotite Gneiss)
Gneiss (high-grade metamorphic rock primarily composed of Silicates)
metamorphic
Serpentine
Antigorite/Lizardite (Mg,Fe)3Si2O5(OH)4
metamorphic
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Labradorite
Labradorite (a calcium-enriched feldspar mineral), (Ca, Na)(Al, Si)4O8
mineral
Gneiss
Gneiss
metamorphic
Schist
Mica Schist
metamorphic
Likely tumbled pale-green mineral specimen
Indeterminate; possibly serpentine, calcite, or pale jade/nephrite
mineral
Quartzite
Metamorphic rock (SiO2)
metamorphic
Feldspar (specifically Orthoclase)
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Banded Gneiss
Gneiss
metamorphic
Granite Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Cut red gemstone, likely ruby
Ruby, gem-quality corundum (Al₂O₃) colored by chromium
gemstone
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Unidentified Rock Fragment
Unknown
Rock
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Gneiss (Schistose)
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Rhodonite
Manganese Inosilicate (Mn,Fe,Mg,Ca)SiO3
mineral
Amphibolite
Amphibolite, composed mainly of amphibole (commonly hornblende) and plagioclase feldspar
metamorphic
Gneiss (with Quartz-Feldspar vein)
Gneiss (high-grade metamorphic rock) containing Quartz (SiO2) and Feldspar (KAlSi3O8 – NaAlSi3O8 – CaAl2Si2O8)
metamorphic
Blue sodalite bead necklace
Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂
mineral
Biotite Mica
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Serpentine
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Banded Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Green tumbled stone, possibly serpentine
Likely serpentine-group rock, chiefly serpentine minerals (approx. Mg₃Si₂O₅(OH)₄); identification is uncertain from the photograph.
metamorphic
Gneiss (High-grade Metamorphic Rock)
Gneiss
metamorphic
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2
mineral
Almandine Garnet
Almandine (Fe3Al2(SiO4)3)
gemstone
Weathered quartz-bearing rock, possibly serpentine or altered ultramafic rock
Provisional identification: serpentinite or chlorite–quartz schist; exact composition requires testing
metamorphic
Probable serpentinite (serpentine-rich rock)
Serpentinite; chiefly serpentine-group minerals (Mg₃Si₂O₅(OH)₄), with possible magnetite and olivine remnants
metamorphic
Gneiss
Gneiss (Metamorphic rock composed primarily of quartz, feldspar, and mica)
metamorphic
Gneiss (High-Grade Metamorphic Rock)
Gneiss (primarily composed of Quartz, Feldspar, and Mica/Amphiboles)
metamorphic
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic