Blue Sphalerite (likely dyed or treated Druzy Quartz/Agate)
Zinc Sulfide (ZnS) or Silicon Dioxide (SiO2) with trade-name enhancement
Mineral
Category
Metamorphic (Likely Gneiss Or Schist Based On Texture)
Browse metamorphic (likely gneiss or schist based on texture) specimens identified by the Rock Identifier community.
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Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
Mineral
Gneiss
Gneiss (a type of metamorphic rock)
Metamorphic Rock
Fuchsite
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Mica Schist with Quartz
Crystalline Schist (SiO2 + KAl2(AlSi3O10)(OH)2)
metamorphic
Gneiss with Iron Staining and Sulfide Mineralization
Metamorphic Gneiss / Amphibolite with Iron/Sulfide Oxidation
metamorphic
Gneiss
Gneiss
metamorphic
Schist
Mica Schist
metamorphic
Quartz (likely Milky Quartz)
Quartz (SiO₂ - Silicon Dioxide)
Mineral
Green Schist
Greenschist (composed of Chlorite, Actinolite, and Epidote)
metamorphic
Gneiss (Granitic Gneiss)
Gneiss
metamorphic
Greenstone
Greenschist / Meta-basalt
metamorphic
Quartzite Cobble
Meta-quartzite (SiO2)
metamorphic
Green Aventurine
SiO2 (Silicon Dioxide with inclusions of Fuchsite)
mineral
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Greenstone (Greenschist facies)
Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)
metamorphic
Rounded quartz-rich cobble, likely granite-derived stone
Granite or granitic gneiss, composed mainly of quartz, feldspar, and minor mica
igneous
Garnet Amphibolite (or Garnet Gneiss)
Garnet amphibolite / Garnet-bearing metamorphic rock
metamorphic
Gneiss
Gneiss
metamorphic
Pink Granite Pebble
Granite (Phaneritic igneous rock)
igneous
Cinnabar in Quartz
Silicon Dioxide (SiO2) with Mercury Sulfide (HgS) inclusions
Mineral
Gneiss
Foliated Metamorphic Rock
metamorphic
Pink Marble or Rose Quartz (Likely Pink Marble based on carving texture)
Recrystallized Calcite (CaCO3)
metamorphic
Gneiss (Banded Gneiss)
Gneiss
metamorphic
Iron-Stained Quartzite
Recrystallized Meta-Quartzite (primarily SiO2)
metamorphic
Granite Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Gneiss
Gneiss
metamorphic
Sandstone
Arenite (SiO2 based)
sedimentary
Gneiss (Schistose)
Gneiss
metamorphic
Mica Schist
Mica Schist (Muscovite subclass)
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss Pebble
Gneiss
metamorphic
Potassium Feldspar (Orthoclase)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Glacial erratic boulder
Likely weathered sandstone or quartzitic sandstone; exact identification requires a fresh surface and locality
sedimentary
Greenschist
Chlorite schist
metamorphic
Schist
Mica Schist
metamorphic
Raw Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
mineral