Gneiss
Foliated Metamorphic Rock (Gneiss)
Category
Browse mineral with metamorphic or sedimentary host specimens identified by the Rock Identifier community.
Gneiss
Foliated Metamorphic Rock (Gneiss)
Nuummite
Nuummite (Orthoamphibole rock / Anthophyllite-Gedrite blend)
Blue Quartz (Aventurine)
Silicon Dioxide (SiO2) with Crocidolite or Magnesio-riebeckite inclusions
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
Amethyst Geode/Cluster
Quartz (SiO2) - variety Amethyst
Biotite Schist
Biotite Schist
Mica Schist
Mica Schist (Schistose metamorphic rock rich in Muscovite/Biotite)
Gneiss (specifically a water-worn pebble)
Gneiss
Gneiss (likely)
Gneiss
Quartzite
Quartzite (primarily SiO2)
Magnetite
Magnetite (Fe3O4)
Biotite Mica
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
Schist (Micaceous Schist)
Schist (comprising Muscovite/Biotite mica, Quartz, and Feldspar)
Mica Schist
Mica Schist (primarily Muscovite and Biotite KAl2(AlSi3O10)(OH)2)
Pyrite
Iron Disulfide (FeS2)
Orange Calcite
Calcium Carbonate (CaCO3)
Tiger Iron / Banded Iron Formation
Banded Iron Formation (SiO2 with Fe2O3 and FeOOH)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Emerald
Beryl (Be3Al2(SiO3)6) with Chromium and/or Vanadium impurities
Banded Gneiss
Gneiss (High-grade metamorphic rock typically composed of Quartz, Feldspar, and Biotite/Amphiboles)
Amethyst Quartz Druse
Silicon Dioxide (SiO2) with iron impurities
Clear Quartz (Herkimer Diamond variant)
Silicon Dioxide (SiO2)
Pyrite
Pyrite (Iron sulfide, FeS₂)
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Orange Calcite
Calcium Carbonate (CaCO3)
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Quartz
Silicon Dioxide (SiO2)
Gneiss
Gneiss
Gneiss (Granitic Gneiss)
Gneiss
Quartzite Pebble (River Rock)
Quartzite (SiO2)
Mica Schist with Iron Staining
Muscovite/Biotite Schist
Tiger Iron
Tiger Iron (Composition: SiO2, Fe2O3, Fe3O4)
Petrified Wood
Silicified wood (primarily Quartz/Chalcedony, SiO2)
Gneiss
Gneiss
Gneiss (Metamorphosed Pebble)
Gneiss with Quartz/Feldspar banding
Gneiss
Gneiss (High-grade metamorphic rock)
Gneiss
Gneiss (High-grade Metamorphic Rock)
Gneiss (Granite Gneiss)
Gneiss
Calcite
Calcium Carbonate (CaCO3)
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Yellow Calcite
Calcium Carbonate (CaCO3)
Milky Quartz
Silicon Dioxide (SiO2)