Conglomerate
Conglomerate
Sedimentary Rock
Category
Mineral (Biogenic)
Browse mineral (biogenic) specimens identified by the Rock Identifier community.
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Basalt
Basalt
igneous
Beads (likely glass or man-made material)
N/A (artificial material)
Man-made material, not a natural rock or mineral specimen
Granitic Pegmatite
Granitic Pegmatite (principally Quartz, Potassium Feldspar, and Mica)
igneous
Tiger's Eye
Tiger's eye (Pseudomorph of Quartz after Crocidolite), SiO2
metamorphic
Sandstone (likely River-tumbled Picture Sandstone)
Arenite (predominantly SiO2 with iron oxide impurities)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Hematite (Iron Ore)
Hematite (Fe2O3)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
N/A (Non-Geological Specimen)
N/A
Fossilized Shark Tooth (Otodus)
Otodus sp. (calcium phosphate/hydroxylellite)
sedimentary
Green Aura Quartz (Titanium treated Kyanite or Quartz)
Silicon Dioxide (SiO2) or Aluminum Silicate (Al2SiO5) with Titanium/Metal Oxide coating
mineral (man-made aura treatment)
Calamites
Calamites (Pith cast fossil)
sedimentary
Iron-stained Quartz (Gossan/Limonite-coated Quartz)
Silicon Dioxide (SiO2) with Hydrated Iron Oxides (FeO(OH)·nH2O)
mineral
Basalt with Quartz Vein
Basalt (SiO2 vein inclusion)
igneous
Chrysocolla on Quartz/Rhyolite matrix
Hydrated copper phyllosilicate mineral: (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Garnet
Garnet Group (Silicate Minerals)
mineral
Himalayan Salt (Halite)
Halite (NaCl) with trace minerals
mineral
Nephrite Jade (or Serpentine)
Nephrite (a variety of amphibole mineral tremolite-actinolite) or Serpentine Group minerals
Mineral/Rock
Blue Apatite
Apatite-(CaF), Ca5(PO4)3F
mineral
Milky Quartz (Gold-bearing Prospecting Specimen)
Silicon Dioxide (SiO2)
mineral
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
metamorphic
Erythrite
Erythrite (Cobalt Bloom) - Co3(AsO4)2·8H2O
mineral
Milky Quartz with Chlorite inclusions
Silicon Dioxide (SiO2) with Chlorite group minerals
mineral
Limonite (Iron Ore)
Hydrous Iron Oxide (goethite, lepidocrocite)
Mineral
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Limonite (Iron Ore)
Hydrated ferric oxide (FeO(OH)·nH2O)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
mineral
Bauxite (Pisolitic Bauxite)
Bauxite (mixture of Hydrous Aluminum Oxides)
sedimentary
Greenstone (Epidote/Chlorite Rich Rock)
Metabasalt (often contains Epidote Ca2Al2(Fe3+;Al)(SiO4)(Si2O7)O(OH))
metamorphic
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz River Pebble with Algae
Silicon Dioxide (SiO2) with organic biofilm
metamorphic or igneous
Rough Quartz (Alluvial Pebbles)
Silicon Dioxide (SiO2)
mineral
Greenstone with Epidote or Quartz veins
Metabasalt (Greenstone facies)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Pink/Orange Variety)
Silicon Dioxide (SiO2)
mineral
Chert (specifically Green Chert/Jasper)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Quartz (Gravel fragment)
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral