Calcite
Calcite (CaCO₃), likely crystalline limestone or marble fragment
mineral
Category
Sedimentary (Chemically Precipitated Mineral)
Browse sedimentary (chemically precipitated mineral) specimens identified by the Rock Identifier community.
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Jasper
Silicon dioxide (Microcrystalline quartz, SiO2 with iron oxide impurities)
sedimentary
Blue Apatite
Fluorapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Honey calcite crystal
Calcite (calcium carbonate, CaCO₃)
mineral
Quartz-veined Sandstone
Sedimentary rock with quartz vein (SiO2)
sedimentary
Agate
Agate (Silicon Dioxide - SiO2)
mineral
Red Sandstone
Quartzose Sandstone (primarily quartz grains cemented by iron oxides)
sedimentary
Chalcedony (Agate / Quartz Geode Fragment)
Silicon Dioxide (SiO2)
mineral
Amethyst Geode
Amethyst/Purple Quartz (SiO2)
mineral
Banded Sandstone (Liesegang Rings)
Sedimentary Arenite (SiO2 with FeO/Fe2O3 impurities)
sedimentary
Ferruginous Sandstone (Gozzanous)
SiO2 (Quartz) with FeO(OH) (Goethite) or Fe2O3 (Hematite) coating
sedimentary
Chert Arrowhead (Lithic Tool)
Microcrystalline quartz (SiO2) - Archeological lithic artifact
sedimentary
Pyrite-bearing Rock / Pyrite Ore
Iron Sulfide (FeS2) in host rock matrix
mineral
Limestone with Calcite Veining
Calcium Carbonate (CaCO3) - Biogenic/Chemical Sedimentary Rock
sedimentary
Jasper
Microcrystalline Quartz (SiO2)
sedimentary
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Rough Green Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Orange calcite
Calcite (calcium carbonate, CaCO₃)
mineral
Porous limestone (likely calcareous stone)
Limestone, chiefly calcite (CaCO₃); exact identification is uncertain from the image
sedimentary
Probable limestone bedrock
Limestone, composed chiefly of calcite (CaCO₃)
sedimentary
Sandstone with Iron Staining
Clastic sedimentary rock (SiO2 with iron oxides)
sedimentary
Blue calcite
Calcite (CaCO₃), blue variety
mineral
Quartz vein in host rock
Quartz (SiO₂), likely in a weathered carbonate or sedimentary matrix
mineral
Red Jasper
Silicon Dioxide with Iron Oxide (SiO2)
mineral
Yellow Ocher (Limonite)
Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O
mineral
Small pale-yellow crystal, possibly calcite
Calcite (CaCO₃), tentative identification from the image
mineral
Jasper
Cryptocrystalline Quartz (SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Polished agate geode nodule
Microcrystalline quartz (SiO₂), chiefly chalcedony; likely an agate-filled geode
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Polished honey calcite heart
Calcite (calcium carbonate, CaCO₃)
mineral
Golden Calcite
Calcium Carbonate (CaCO3)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Hematite
Hematite (Fe2O3)
mineral
Red Jasper
Microcrystalline quartz (SiO2)
sedimentary
Rounded limestone pebble
Calcite-rich limestone (CaCO₃)
sedimentary