Granite
Phaneritic plutonic rock (primarily Quartz, Feldspar, and Mica)
igneous
Category
Mineral, Possibly Rock Fragment Containing A Mineral
Browse mineral, possibly rock fragment containing a mineral specimens identified by the Rock Identifier community.
Basalt
Basalt (Mafic volcanic rock)
igneous
Granitic Pegmatite with Schorl Tourmaline
Granitic Pegmatite (Schorl: NaFe3Al6(BO3)3Si6O18(OH)4)
igneous
Shungite
Non-crystalline carbon (similar to anthracite coal or meta-anthracite)
metamorphic
Sandstone or Mudstone
Sedimentary Rock (Sandstone/Mudstone)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Coprolite
Coprolite
sedimentary
Bituminous Coal
Bituminous coal (Organic Sedimentary Rock)
sedimentary
Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Greyling Sandstone / Greywacke
Lithic Wacke (SiO2 + diverse mineral fragments)
sedimentary
Coquina / Shelly Limestone
Coquina (calcium carbonate, CaCO3)
sedimentary
Chalk / Sedimentary Limestone
Calcium Carbonate (CaCO3) - Biogenic Sedimentary Rock
sedimentary
Gneiss (Metamorphic Cobble)
Gneiss
metamorphic
Pyrite (Iron Pyrites)
Iron Sulfide (FeS2)
mineral
Gneiss (specifically Banded Gneiss)
Gneiss
metamorphic
Conglomerate (or Breccia)
Clastic Sedimentary Rock
sedimentary
Pegmatite with Schorl (Black Tourmaline) and Mica
Pegmatite (complex association of NaAlSi3O8, NaFe3Al6(BO3)3Si6O18(OH)4, and KAl2(AlSi3O10)(OH,F)2)
igneous
Sandstone (Greywacke)
Clastic Sedimentary Rock (SiO2 with lithic fragments)
sedimentary
Milk Quartz (Vein Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Sunstone
Plagioclase Feldspar ((Ca,Na)(Al,Si)4O8)
mineral
Fossiliferous Limestone (Coquina)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
Fuchsite
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Shale or Argillite
Shale (sedimentary) / Argillite (metamorphic)
Sedimentary or Metamorphic (low-grade)
Granite (Pink/Red Granite)
Phaneritic Igneous Rock (primarily SiO2, KAlSi3O8, NaAlSi3O8)
igneous
Chert (and Chert Geode)
Silicon Dioxide (SiO2)
sedimentary
Glauconitic Sandstone (Greensand pebble)
Glauconitic Quartz Sandstone (K(Fe,Al)2(Si,Al)4O10(OH)2)
sedimentary
Olivine Peridotite
Peridotite (comprising Olivine (Mg,Fe)2SiO4 and Pyroxene)
igneous
Ferruginous Conglomerate
Ferruginous Conglomerate (Clastic Sedimentary Rock)
sedimentary
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Basalt
Basalt
Igneous
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Granodiorite with Quartz Veining
Granodiorite (containing Plagioclase Feldspar, Quartz, and Biotite/Hornblende) with Quartz (SiO2) veins
igneous
Conglomerate (Asphaltic/Anthropogenic)
Clastic sedimentary rock / Bituminous mixture
sedimentary
Greywacke
Dirty Sandstone (Lithic wacke)
sedimentary
Pallasite Meteorite
Pallasite (Stony-iron meteorite; Fe-Ni alloy with (Mg,Fe)2SiO4 olivine)
Mineral/Extraterrestrial Rock
Banded Iron Formation (BIF)
Banded Iron Formation
sedimentary
Lapis Lazuli
Complex metamorphic rock containing Lazurite ((Na,Ca)8(AlSiO4)6(SO4,S,Cl)2), Calcite, and Pyrite
metamorphic
Fossiliferous Limestone (containing Brachiopods)
Biogenic Limestone (Calcium Carbonate, CaCO3)
sedimentary
River Cobble (likely Quartzite or Limestone)
SiO2 (Quartzite dominant) or CaCO3 (Limestone dominant)
metamorphic or sedimentary
Brecciated Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Banded Gneiss
Gneiss (high-grade metamorphic silicate rock)
metamorphic
Pumice
Vesicular Rhyolite or Dacite
igneous