Calcite (Optical or Clear Calcite)
Calcium Carbonate (CaCO3)
Category
Browse sedimentary (primary) with artificial modification specimens identified by the Rock Identifier community.
Calcite (Optical or Clear Calcite)
Calcium Carbonate (CaCO3)
Calcite
Calcium Carbonate (CaCO3)
Optical Calcite (Iceland Spar)
Calcite (Calcium Carbonate, CaCO3)
Petoskey Stone (Fossilized Coral)
Hexagonaria percarinata
Heat-Treated Citrine
Quartz (Silicon Dioxide, SiO2)
Blue Agate (likely dyed)
Silicon Dioxide (SiO2)
Fluorite, Turquoise, and Calcite set
Calcium Fluoride (CaF2), Hydrous Phosphate of Copper and Aluminum (CuAl6(PO4)4(OH)8·4H2O), Calcium Carbonate (CaCO3)
Chert / Flint
SiO2 (Silicon Dioxide)
Chert (Grey-Green Var.)
Silicon Dioxide (SiO2)
Bauxite
AlOx(OH)3-2x (mixture of Gibbsite, Boehmite, and Diaspore)
Sandstone
Arenite (SiO2 based)
Limestone Cobble
Sedimentary Limestone (Calcium Carbonate, CaCO3)
Limestone (Weathered Aggregate)
Sedimentary Carbonate Rock (CaCO3)
Limestone Pebble
Sedimentary Calcium Carbonate (CaCO3)
Fossiliferous Limestone
Calcium Carbonate - CaCO3
Limestone with Iron Inclusions
Calcium Carbonate (CaCO3) with Hematite/Limonite
Chert (Pebble)
Microcrystalline silica (SiO2)
Crushed Limestone
Calcium Carbonate (CaCO3)
Chert (Jasper/Flint variant)
Microcrystalline Quartz (SiO2)
Limestone
Calcium Carbonate (CaCO3)
Magnetic Sand Grain / Magnetite Pellet
Magnetite (Fe3O4)
Chert (Jasper/Agate variety)
Microcrystalline Quartz (SiO2)
Aragonite Star Cluster
Aragonite (CaCO3)
Banded Chert
Silicon Dioxide (SiO2)
Chert (often called Flint when found in chalk)
Microcrystalline Quartz (SiO2)
Chert (specifically Flint)
Silicon Dioxide (SiO2)
Sandstone (Ferruginous)
Arenite with Iron oxide staining (SiO2 with Fe2O3)
Limestone with Chert
Calcium Carbonate (CaCO3) with Silica (SiO2) inclusions
Limonite Geode (Ironstone Concretion)
Limonite [FeO(OH)·nH2O] with possible Quartz or Calcite interior
Orange Calcite
Calcium Carbonate (CaCO3)
Botryoidal Goethite
Goethite (α-Fe3+O(OH))
Quartz (Iron-stained or Milky)
Silicon Dioxide (SiO2)
Peacock Ore (Bornite or Chalcopyrite)
Bornite (Cu₅FeS₄) or iridescent Chalcopyrite (CuFeS₂)
Bauxite
Aluminium ore consisting largely of the minerals gibbsite Al(OH)3, boehmite γ-AlO(OH) and diaspore α-AlO(OH)
Asphalt (Road Aggregate)
Bituminous conglomerate
Ferruginous Sandstone (River Pebble)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 cement)
Chert / Flint Pebble
Silicon Dioxide (SiO2)
Limestone
Calcium Carbonate (CaCO3)
Limestone
Limestone (Calcium Carbonate: CaCO3)
Limestone Pebble
Limestone (Calcium Carbonate, CaCO3)
Sandstone
Arenite
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (primarily SiO2)