Garnet (Pyrope-Almandine series)
Garnet Group, (Mg,Fe)3Al2Si3O12
mineral
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 →
River Pebble (Gneiss or Granite)
Metamorphic Rock (likely Gneiss or Granitic composition)
metamorphic
Quartz / Quartzite
Silicon Dioxide (SiO2)
metamorphic
Coarse-grained granite or granitic gneiss
Granite; primarily quartz, potassium feldspar, plagioclase, and biotite/hornblende
igneous
Almandine Garnet
Almandine (Fe3Al2Si3O12)
mineral
Banded Gneiss
Gneiss
metamorphic
Schorl (Black Tourmaline)
Sodium Iron Aluminum Borosilicate (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Tumbled Gray Agate
Silicon Dioxide (SiO2)
mineral
Moonstone (Feldspar)
Orthoclase feldspar, (K,Na)AlSi3O8
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Garnet Schist or Garnet-bearing Quartzite
Metamorphic rock containing Almandine Garnet (Fe3Al2(SiO4)3) and Quartz (SiO2)
metamorphic
Gneiss (with Quartzite and Mica)
Gneiss
metamorphic
Black Sand (Magnetite Sand)
Magnetite-rich Placers (Fe3O4)
sedimentary
Schist
Mica Schist (primarily composed of quartz, feldspar, and mica)
metamorphic
Greenstone
Metabasalt / Greenschist facies rock
metamorphic
Gneiss
Gneiss
metamorphic
Dark green metamorphic rock, likely serpentinite
Serpentinite, composed mainly of serpentine-group minerals (antigorite, lizardite, or chrysotile), commonly with magnetite and minor chlorite/talc
metamorphic
Tiger's Eye
Pseudomorph of Crocidolite (SiO2 with iron oxides)
mineral
Gemstone Sand (Mineral Assortment)
Mixed Mineral Concentrates (Commonly including Quartz SiO2, Garnet X3Y2(SiO4)3, and Tourmaline (Na,Ca)(Li,Mg,Al)3(Al,Fe,Mn)6(BO3)3(Si6O18)(OH,F)4)
mineral
Milky Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Faceted Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
gemstone
Quartzite (specifically Milky Quartz variety)
Quartz (SiO2)
metamorphic
Orange Aventurine / Quartz
Silicon Dioxide (SiO2) with Hematite or Goethite inclusions
mineral
Weathered quartz-rich rock fragment
Likely quartz-bearing feldspathic rock; exact identification requires testing
mineral
Mica Schist
Mica Schist (predominantly Muscovite/Biotite)
metamorphic
Stiped Slate Beach Pebble
Low-grade Metamorphic Slate with Quartz Vein (SiO2 on Phyllosilicate base)
metamorphic
Red Garnet
Pyrope or Almandine (X3Y2(SiO4)3)
mineral
Greenstone
Metamorphic mafic rock (greenschist facies)
metamorphic
Milky quartz fragment
Quartz (silicon dioxide, SiO₂)
mineral
Quartz River Rock
Silicon Dioxide (SiO2)
mineral
Banded gneiss
Gneiss, typically quartz–feldspar–mica assemblage
metamorphic
Schist
Mica Schist
metamorphic
Biotite Mica
K(Mg,Fe2+)3(Al,Fe3+)Si3O10(OH,F)2
Mineral
Orthoclase Feldspar with Quartz
Orthoclase (KAlSi3O8)
mineral
River Cobble (Quartzite or Gneiss)
Metamorphic crystalline rock (predominantly SiO2 based)
metamorphic
Mica Schist
Mica Schist (principally Biotite/Muscovite, Quartz, and Feldspar)
metamorphic
Unidentified Rock Fragment
Unknown
Rock
Schist
Mica Schist
metamorphic
Mica Schist
Mica Schist (Complex Silicate Rock)
metamorphic
Banded gneiss
Felsic biotite–quartz–feldspar gneiss
metamorphic