Quartz (Milky/Iron-stained)
Silicon Dioxide (SiO2)
mineral
Category
Metamorphic Rock (Primarily Composed Of Minerals)
Browse metamorphic rock (primarily composed of minerals) specimens identified by the Rock Identifier community.
Learn about Metamorphic Rock (Primarily Composed Of Minerals) in the encyclopedia
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Biotite (Mica)
Biotite group (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Mookaite Jasper
Silicon Dioxide (SiO2) - Radiolarite
sedimentary
Greenstone (metamorphosed basalt)
Greenschist / Meta-basalt
metamorphic
Greenstone
Protolith of basalt, diabase, or gabbro; often contains minerals like chlorite, actinolite, and epidote
metamorphic
Granite (Phaneritic)
Granite (Plutonic Igneous Rock)
igneous
Lapis Lazuli
Lapis Lazuli (Rock composed primarily of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4
metamorphic
Grey River Stone (Quartz-rich Quartzite/Siltstone)
Quartzite / Meta-siltstone (primarily SiO2)
Metamorphic (low-grade)
Jadeite
NaAlSi2O6 (Sodium Aluminum Silicate)
mineral
Banded Gneiss and Siltstone River Stones
Gneiss (High-grade Metamorphic Rock)
metamorphic
Greenish rock with white veins, possibly epidote or chlorite bearing rock with quartz/calcite veins
Altered mafic rock or Epidosite
metamorphic or igneous alteration
Banded Gneiss
Gneiss (Metamorphic high-grade rock)
metamorphic
Pink Granite
Granite (composed primarily of Quartz, K-Feldspar, and Plagioclase)
igneous
Sandstone
Sandstone (lithified arenite/wacke)
Sedimentary Rock
Peach Moonstone
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Greenstone Pebble
Metabasalt (often containing chlorite, actinolite, or epidote)
metamorphic
Yellow Jade (often Serpentine or Dolomite)
Primarily Serpentine (Mg3Si2O5(OH)4) or Dolomite (CaMg(CO3)2), though the term 'yellow jade' is also sometimes applied to varieties of true nephrite or jadeite.
Mineral, often a rock given its aggregate nature
Greenstone
Metabasalt / Greenschist facies rock
metamorphic
Banded Gneiss with Quartz Vein
Gneiss containing SiO2 (Quartz) intrusion
metamorphic
Rough Tanzanite
Zoisite (Ca2Al3(SiO4)3(OH))
mineral
Moonstone
Orthoclase Feldspar (KAlSi3O8) with inclusions of Albite
mineral
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
mineral
Greenstone / Quartzite Pebble
Metamorphosed Quartz-rich Rock
metamorphic
Prase or Green Quartz
Silicon Dioxide (SiO2 with actinolite or chlorite inclusions)
Mineral
Basalt with Iron Oxidation (Lattice/Veined)
Mafic Volcanic Rock (principally Plagioclase and Pyroxene)
igneous
Serpentinite
Serpentinite (composed primarily of mineral group (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4)
metamorphic
Granite
Phaneritic Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)
igneous
Agate
Cryptocrystalline Quartz (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Mica Schist
Mica Schist
metamorphic
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 - Muscovite component)
metamorphic
Unakite Granitoid
Unakite (Metasomatized Granite)
metamorphic
Fuchsite (Chrome Mica)
Cr-bearing Muscovite - K(Al,Cr)2(AlSi3O10)(OH)2
mineral
Shale
Shale (comprised mostly of clay minerals and quartz)
sedimentary
Granite
Granite (a common rock type, not a single mineral with a formula. Composed primarily of quartz, feldspar, and mica/amphibole).
igneous
Quartz (Grain)
Silicon Dioxide (SiO2)
mineral
Garnet
Garnet group species (likely Almandine, Fe3Al2(SiO4)3)
mineral
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Granite
Granite
igneous
Fuchsite
Fuchsite (a variety of Muscovite mica, K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
mineral