Greenstone / Serpentinite
Serpentinite (composed largely of Serpentine group minerals, Mg3Si2O5(OH)4)
metamorphic
Category
Mineral In Metamorphic Rock
Browse mineral in metamorphic rock specimens identified by the Rock Identifier community.
Learn about Mineral In Metamorphic Rock in the encyclopedia
View all →
Mica Schist
Mica Schist (Composition typically includes Muscovite KAl2(AlSi3O10)(OH)2 and Quartz SiO2)
metamorphic
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Aventurine (Green Quartz)
Silicon Dioxide (SiO2) with Fuchsite inclusions
mineral
Milky quartz (quartz-rich rock fragment)
Quartz, silicon dioxide (SiO₂)
mineral
Gneiss
Gneiss
metamorphic
African Turquoise (Jasper)
Quartz (SiO2) with impurities (Epidote/Amphibole)
metamorphic
Epidosite
Epidosite (Metasomatic calcium-aluminum silicate rock)
metamorphic
Quartzite Pebble (River Rock)
Quartzite (SiO2 with iron oxide inclusions)
metamorphic
Mica Schist
Mica Schist (primarily Muscovite and Quartz composition)
metamorphic
Small rounded pebble, likely quartz-rich river stone
Indeterminate; likely quartz/chert-bearing lithic clast
sedimentary
Quartzite (River Pebble)
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Black Spinel
Magnesium Aluminum Oxide (MgAl2O4)
mineral
Eclogite
Eclogite (Omphacite-Garnet rock)
metamorphic
Quartz (likely tumbled or naturally water-worn)
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Weathered greenstone (likely serpentinite or altered basalt)
Serpentinite-group rock, commonly dominated by serpentine minerals (antigorite/lizardite); exact identification requires testing
metamorphic
Orthoclase Feldspar
Potassium aluminum silicate (KAlSi3O8)
mineral
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals: (Mg,Fe)3Si2O5(OH)4)
metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
gemstone
Quartz-rich pegmatite (likely granite/pegmatite boulder)
Coarse-grained felsic igneous rock, chiefly quartz (SiO₂), feldspar, and minor mica; exact identification requires testing
igneous
Quartz crystal fragment in weathered host rock
Quartz (SiO₂), possibly in a feldspathic or iron-stained matrix
mineral
Serpentinite
Serpentinite (composed largely of serpentine group minerals including antigorite, lizardite, and chrysotile)
metamorphic
Quartzite
Quartzite (chiefly SiO2)
metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Lapis Lazuli
Complex rock composed mainly of lazurite, calcite, and pyrite
gemstone
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Pink Quartzite
Quartzite (SiO2 with minor iron oxide impurities)
metamorphic
Likely weathered brown quartz-bearing rock
Tentatively weathered granite or granitic gneiss; exact identification is uncertain from the photograph
igneous
Petrified Wood
Silicified wood (primarily Silicon Dioxide, SiO2)
metamorphic
Pyrite in Quartz
Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)
mineral
Quartz Vein in Gneiss or Schist
Metamorphic rock with SiO2 vein
metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Biotite Mica
Biotite, K(Mg,Fe)3AlSi3O10(F,OH)2
mineral
Yellow Quartz (Citrine/Yellow Jasper mix)
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (primarily SiO2)
metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Blue Quartzite
Quartzite (specifically a variety enriched with blue-coloring minerals)
Metamorphic Rock
Mica Schist
Schist (Muscovite-Biotite Schist)
metamorphic
Gneiss
Gneiss
metamorphic
Quartzite
Metamorphic quartz rock (SiO2)
metamorphic
Quartzite
Metamorphic Quartz Rock (SiO2)
metamorphic