Diamond
Diamond (pure carbon; C)
Category
Browse mineral like industrial smelting waste specimens identified by the Rock Identifier community.
Diamond
Diamond (pure carbon; C)
Diamond
Diamond (a metastable allotrope of carbon, C)
Blue Kyanite
Kyanite (Al2SiO5)
Talc (Soapstone variety)
Talc (Hydrated magnesium silicate) - Mg3Si4O10(OH)2
Diamond (in jewelry setting)
Carbon (C)
Granodiorite
Granodiorite (Na,Ca)(Al,Si)4O8
Kyanite (in Schist Matrix)
Kyanite (Al2SiO5)
Anthracite
Anthracite coal
Note: Item is not a geological specimen
Homo sapiens (Dermal Appendage: Pilus)
Travertine (often colloquially called Tufa)
Chemical Sedimentary Calcium Carbonate (CaCO3)
Pumice
Pumice (a vesicular volcanic glass)
Garnet-Bearing Schist
Almandine Garnet Micaceous Schist
Chalcedony (Botryoidal or Tumbled)
Chalcedony (SiO₂)
Diamond (faceted)
Diamond (Pure Carbon, C)
Synthetic Costume Accessory (Non-Geological)
Polyester and Acrylic Fiber (Anthropogenic polymer)
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 - Muscovite component)
Chalcedony (Common Opal/Chert variety)
Silicon Dioxide (SiO2)
Pumice
Pumice (Amorphous volcanic glass)
Diamond (or high-quality simulant like Cubic Zirconia)
Carbon (C) - Native Element
Quartz Geode
Silicon Dioxide (SiO2) in Geode form
Grey Chalcedony (Agate)
Silicon Dioxide (SiO2)
Kyanite
Kyanite (Al2SiO5)
Olivine-bearing Basalt / Scoria
Mafic Igneous Rock (primarily (Mg, Fe)2SiO4)
Brachiopod Fossil in Limestone
Phylum Brachiopoda (likely Order Spiriferida), CaCO3 (Calcite)
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 inclusions)
Graphite
Graphite (Native Carbon, C)
Agate Geode
Silicon Dioxide (SiO2)
Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
Orange Quartzite (River Pebble)
Quartzite (SiO2 with iron oxide inclusions)
Rough Diamond
Diamond (pure Carbon, C)
Schist with Garnet inclusions
Garnet-mica-schist
Black Sapphire
Corundum (Al2O3 with inclusions of hematite or ilmenite)
Aquamarine
Beryl (Be3Al2Si6O18 with iron impurities)
Milk Quartz (Tumbled)
Silicon Dioxide (SiO2)
Druzy Quartz (on Geode Fragment)
Silicon Dioxide (SiO2)
Quartz Geode (with possible Manganese or Goethite coating)
Silicon Dioxide (SiO2)
Aquamarine
Beryl (Be3Al2Si6O18 with iron impurities)
Fossilized Oyster Shell
Gryphaea or Crassostrea fossil (Calcium Carbonate, CaCO3)
Diamond
Native Carbon (C)
Red Sandstone
Arenite (Ferruginous Sandstone)
Desert Rose (Baryte or Gypsum Rose)
Baryte (BaSO4) or Gypsum (CaSO4·2H2O)
Smoky Quartz (with inclusions)
Silicon Dioxide (SiO2)