Garnet Schist
Garnet-bearing Mica Schist (variety of compositions, often Al2SiO5 with X3Y2(SiO4)3)
metamorphic
Category
Mineral And Metamorphic Rock
Browse mineral and metamorphic rock specimens identified by the Rock Identifier community.
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Weathered metamorphic rock, likely gneiss or schist
Indeterminate foliated silicate rock; commonly quartz–feldspar–mica assemblage
metamorphic
Gneiss
High-grade metamorphic rock (Gneiss)
metamorphic
Veined quartz-bearing metamorphic rock
Likely quartzite or siliceous schist with iron-oxide staining
metamorphic
Banded Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Gneiss
Gneissic Metamorphic Rock
metamorphic
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
mineral
Quartz fragment (Pebble)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Granite Gneiss
Granitic Gneiss
Metamorphic
Blue-gray metamorphic rock, likely gneiss or schist
Quartz–feldspar–mica assemblage; exact identification requires testing
metamorphic
Aquamarine
Beryl (Be3Al2Si6O18)
gemstone
Green Slate or Metamorphic Rock
Metamorphic rock (chlorite/actinolite-bearing)
metamorphic
Tiger's Eye
Silicon dioxide (SiO2) with fibrous inclusions of crocidolite
Mineral
Gneiss (Metamorphic Rock)
Gneiss
metamorphic
Tumbled Quartz
Silicon Dioxide (SiO2)
mineral
Tiger Iron
Tiger Iron (Hematite, Red Jasper, and Tiger's Eye)
metamorphic
Feldspar (Plagioclase / Orthoclase)
KAlSi3O8 / CaAl2Si2O8 - NaAlSi3O8
mineral
Quartz (Milky / Clear Quartz Fragment)
Silicon Dioxide (SiO2)
mineral
Leopard jasper (orbicular jasper)
Silicified volcanic rock, chiefly microcrystalline quartz/chalcedony (SiO₂) with feldspar and iron-oxide inclusions
metamorphic
Gneiss Pebble
Gneiss
metamorphic
Tiger's Eye
Silicon Dioxide with Crocidolite (SiO2)
mineral
Moonstone
Orthoclase Feldspar (KAlSi3O8)
mineral
Tumbled Amethyst
Quartz (Silicon Dioxide, SiO2, colored by iron impurities)
mineral
Muscovite Mica Schist
Metamorphic Rock (Muscovite-Biotite Schist)
metamorphic
Lapis Lazuli (Tumbled)
Lazurite-dominated contact metamorphic rock
metamorphic
Serpentinite
Serpentinite (complex silicate minerals including lizardite, chrysotile, and antigorite: (Mg,Fe)3Si2O5(OH)4)
metamorphic
K-Feldspar (Potassium Feldspar)
Orthoclase / Microcline (KAlSi3O8)
mineral
Slate
Slate (Metamorphic Rock)
metamorphic
Gneiss
Gneissic Metamorphic Rock
metamorphic
Agate
Silicon Dioxide (SiO2)
mineral
Gneiss (River Cobble)
Gneiss
metamorphic
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Banded Rock (likely Quartz-rich)
Uncertain, likely a Metamorphic Rock (e.g., Gneiss or Schist) with prominent Quartz and other minerals
Mineral
Biotite (Black Mica)
Biotite (K(Mg,Fe++)3AlSi3O10(OH,F)2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Mixed Mineral and Fossil Collection
Multi-specimen assemblage (SiO2, CaCO3, FeS2, etc.)
mineral
Milky Quartz with Country Rock contact
Silicon Dioxide (SiO2) in contact with Metamorphic/Igneous rock
mineral
Quartz-rich metamorphic rock, likely quartzite
Quartzite; predominantly crystalline SiO₂, possibly with mica or iron-oxide impurities
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Greenish Metamorphic Rock (likely containing epidote or chlorite)
Metamorphic rock, possibly epidosite or greenstone
Metamorphic