Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Category
Sedimentary And Igneous (Mixed)
Browse sedimentary and igneous (mixed) specimens identified by the Rock Identifier community.
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Gneiss (Metamorphic Rock)
Gneiss (high-grade regional metamorphic rock)
metamorphic
Almandine Garnet
Almandite (Fe3Al2(SiO4)3)
Mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Banded Gneiss with Quartz Vein
Foliated Metamorphic Rock (Gneiss)
metamorphic
Gneiss
Gneiss
metamorphic
Agate (specifically a Blue Agate Geode Slice)
Chalcedony (cryptocrystalline variety of Quartz); SiO2
mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Amethyst and Hematite Bracelet
Amethyst (SiO2) and Hematite (Fe2O3)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Unidentified Rock Fragment
Unknown
Rock
Gneiss
Gneissic Metamorphic Rock
metamorphic
Rough Quartz (or Quartzite pebble)
Silicon Dioxide (SiO2)
mineral
Gneiss (Metamorphic Cobble)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Greenschist
Greenschist facies rock (containing chlorite, actinolite, albite, and epidote)
metamorphic
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Hematite (Iron Ore)
Hematite (Fe2O3)
mineral
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Banded Gneiss
Gneiss (quartz-feldspar-biotite metamorphic rock)
metamorphic
Hematite
Iron(III) oxide (Fe2O3)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Gneiss
Gneiss (high-grade metamorphic rock typically composed of quartz, feldspar, and mica)
metamorphic
Jasper
Silicon Dioxide (SiO2)
Mineral
Basalt River Stone
Basalt
igneous
Kaolinite (Chalky Clay)
Kaolinite (Al2Si2O5(OH)4)
sedimentary
Sand (Construction Grade)
Unconsolidated siliciclastic sediment (primarily SiO2)
sedimentary
Rose Quartz
Rose Quartz (SiO2)
Mineral
Carnelian
Carnelian (SiO2 with Iron Oxide impurities)
mineral
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Yellow Agate
Chalcedony (cryptocrystalline Quartz), SiO2
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Turquoise
Hydrated phosphate of copper and aluminum - CuAl6(PO4)4(OH)8·4H2O
mineral
Gneiss
Gneiss
metamorphic
Granite Gneiss
High-grade regional metamorphic rock (Quartz-Feldspar Gneiss)
metamorphic
Agate Geode
Cryptocrystalline Quartz (SiO2)
mineral
Pyrite (Iron Pyrite)
Iron Sulfide (FeS2)
mineral
Carnelian
Silicon dioxide (SiO2) with iron oxide impurities
mineral