Mica Schist
Mica Schist (primarily Muscovite or Biotite)
metamorphic
Category
Mineral (Refined Metal)
Browse mineral (refined metal) specimens identified by the Rock Identifier community.
Learn about Mineral (Refined Metal) in the encyclopedia
View all →
Fossilized Wood (with Coal and Limonite)
Petrified Wood (Silicified or Carbonized Flora)
sedimentary
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Tiger's Eye
Tiger's Eye (a variety of Chalcedony, which is cryptocrystalline quartz). Chemical Formula: SiO2 with inclusions of crocidolite fibers.
Mineral
Possible weathered mica-rich metamorphic fragment
Mica schist or phyllite (quartz–mica assemblage; identification uncertain from image)
metamorphic
Garnet Schist
Garnetiferous Micaceous Schist
metamorphic
Almandine Garnet in Schist
Almandine, Fe3Al2(SiO4)3
metamorphic
Basalt
Basalt (Aphanitic Mafic Igneous Rock)
igneous
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)
metamorphic
Anthracite Coal
Anthracite (Metamorphic/High-grade Sedimentary Coal)
sedimentary
Fluorite
Calcium Fluoride (CaF2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Garnet-Mica Schist
Garnetiferous Porphyroblastic Schist
metamorphic
Basalt
Basalt (Mafic Extrusive Igneous Rock)
igneous
Basalt
Basalt (dominated by plagioclase feldspar and pyroxene minerals)
Igneous
Quartzite Pebble (with possible inclusion)
Metamorphosed Quartz Sandstone (SiO2 with impurities)
metamorphic
Banded Iron Formation
Banded Iron Formation (BIF)
sedimentary
Schist
Mica Schist (primarily composed of quartz, feldspar, and mica)
metamorphic
Mica Schist
Mica Schist (contains Muscovite/Biotite, Quartz)
metamorphic
Rutilated Quartz
Quartz with Rutile Inclusions (SiO2 with TiO2 inclusions)
Mineral
Basalt
Basalt (Igneous Volcanic Rock)
igneous
Mica Schist
Schist (primarily muscovite and quartz)
metamorphic
Obsidian (specifically Silver Sheen Obsidian)
Volcanic Glass (approx. 70–75% SiO2 plus MgO, Fe3O4)
igneous
Lapis Lazuli
Lapis lazuli (primary mineral: Lazurite, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2)
metamorphic
Sunstone
Feldspar (Oligoclase)
mineral
Rough Diamond
Diamond (Carbon, C)
mineral
Hypersthene
Hypersthene ((Mg,Fe)SiO₃)
Mineral
Pyrite
Iron Pyrite (FeS₂)
Mineral
Pyrite
Pyrite (FeS2)
Mineral
Iron-rich concretion (probable limonite/goethite concretion)
Hydrated iron oxides, chiefly limonite (FeO(OH)·nH₂O) and goethite (FeO(OH))
sedimentary
Amphibolite with Hornblende
Amphibole-rich Metamorphic Rock (Ca2(Mg,Fe)5Si8O22(OH)2)
metamorphic
Schist
Mica Schist
metamorphic
Opalite
Synthetic Glass, SiO2 base with metallic inclusions
mineraloid (synthetic)
Vesicular basalt
Basalt, typically composed of plagioclase feldspar, pyroxene, and minor olivine or iron oxides
igneous
Micaceous Schist
Mica Schist (primarily Muscovite or Biotite KAl2(AlSi3O10)(OH)2)
metamorphic
Desert Varnish on Sandstone
Ferromanganese coating on Quartz Arenite
sedimentary
Moqui Marble (Ironstone Concretion)
Goethite-Hematite Sandstone Concretion
sedimentary
Weathered basalt or iron-rich river cobble
Basalt, likely with iron-oxide staining; exact identification requires testing
igneous
Schist
Schist (Crystalline metamorphic rock)
metamorphic
Blue Goldstone
Aventurine Glass (SiO2 with Co and metallic inclusions)
mineral (synthetic glass)
Vesicular Basalt (Scoria)
Extrusive Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)
igneous
Banded Iron Formation (Jaspilite / Hematite Jasper)
SiO2 + Fe2O3 (Quartz with Hematite/Magnetite)
sedimentary