Garnet-Bearing Schist
Almandine Garnet Micaceous Schist
Category
Browse organic (anthropogenic) specimens identified by the Rock Identifier community.
Garnet-Bearing Schist
Almandine Garnet Micaceous Schist
Quartzite
Quartzite (SiO2)
Chert / Flint
Silicon Dioxide (SiO2)
Yellow Jasper (Chert variant)
Silicon Dioxide (SiO2) with iron oxide inclusions
Mookaite Jasper
Silicified Radiolarite (SiO2)
Schist
Mica Schist (Medium-grade metamorphic rock)
Obsidian and Green Calcite
Volcanic Glass and Calcium Carbonate (CaCO3)
Yellow Chert or Jasper
Silicon Dioxide (SiO2)
Quartzite Pebble
Quartzite (mostly SiO2)
Chert (with Quartz Vein)
Microcrystalline silica (SiO2)
Chert Nodule
Microcrystalline Quartz (SiO2)
Granite
Granite (a plutonic igneous rock composed primarily of quartz, feldspar, and mica)
Petoskey Stone (Fossilized Coral)
Hexagonaria percarinata (CaCO3)
Chert (specifically tan/pink variety)
Silicon Dioxide (SiO2)
Quartzite
Quartzite (primarily SiO2)
Greenschist
Greenschist (Chlorite-actinolite schist)
Yellow Calcite
Calcium Carbonate (CaCO3)
Pink Granite
Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Mica)
Quartzite
Quartzite (primarily SiO2)
Blue Calcite
Calcium Carbonate (CaCO3)
Banded Iron Formation (Hematite/Magnetite-rich)
Banded Iron Formation (BIF)
Almandine Garnet in Matrix
Almandine, Fe3Al2(SiO4)3
Granite
Granite (Felsic Plutonic Rock)
Rough Green Calcite
Calcite (Calcium Carbonate, CaCO3)
Chert (variations include Flint or Jasper)
Chert (SiO2)
Chert (variations include Flint/Jasper)
Chert (Silicon Dioxide, SiO2)
Chert (Flint variety)
Chert (SiO2)
Banded Chert
Microcrystalline Quartz (SiO2)
Mica Schist with Quartz
Mica-Quartz Schist (Muscovite subclass)
Blue Calcite
Calcite (CaCO3)
Chert (Flint variety)
Chert (SiO2)
Chert (and associated Sedimentary rocks)
Microcrystalline Silica (SiO2)
Mica Schist
Mica Schist (Composition typically contains Muscovite: KAl2(AlSi3O10)(OH)2 or Biotite: K(Mg,Fe)3AlSi3O10(OH)2 along with Quartz and Feldspar)
Chert (Tan/Grey variety)
Microcrystalline or cryptocrystalline Quartz (SiO2)
Mookaite Jasper
Mookaite (variety of Chert/Jasper), Silicon Dioxide - SiO2
Chert (Field-collected Arrowhead-shaped Fragment)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Quartzite
Quartzite (SiO2)
Chert (often called Flint when dark)
Microcrystalline silicon dioxide (SiO2)
Quartzite with inclusions
Metamorphic Rock (Mainly SiO2)
Chert (Flint)
Silicon Dioxide (SiO2)
Garnet Schist
Almandine Garnet in Mica Schist (Fe3Al2(SiO4)3)
Chert (Flint variety)
Silicon Dioxide (SiO2)