Chert (River Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Category
Sedimentary (Chemically Precipitated Mineral)
Browse sedimentary (chemically precipitated mineral) specimens identified by the Rock Identifier community.
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Chert (River Pebble)
Microcrystalline Quartz (SiO2)
sedimentary
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Ironstone (Limonite/Hematite)
Ferruginous Sedimentary Rock (composed largely of Fe2O3 and FeO(OH)·nH2O)
sedimentary
Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
mineral
Gold Nugget
Native Gold (Au)
mineral
Limestone
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Goethite (likely as part of Limonite/Ironstone)
Goethite (α-FeOOH)
Mineral
Calcite in Matrix
Calcium Carbonate (CaCO3) on Sedimentary Host Rock
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Dragon Stone
Ohko Stone (Argillaceous sedimentary rock)
sedimentary
Tumbled honey calcite (likely aragonite/calcite material)
Calcite, CaCO₃; possibly aragonite, a polymorph of CaCO₃
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Milky quartz cluster
Quartz (silicon dioxide, SiO₂)
mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Milky quartz (rough quartz crystal)
Quartz, silicon dioxide (SiO₂)
mineral
Milky quartz-bearing rock
Quartz (SiO₂), likely massive milky quartz; possibly quartz-rich pegmatite
mineral
Quartzite Pebble
Quartzite
metamorphic
Chert (Jasper-rich)
Silicon Dioxide (SiO2)
sedimentary
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz pebble
Quartz (Silicon dioxide, SiO2)
mineral
Yellow Calcite (Polished)
Calcium Carbonate (CaCO3)
mineral
Optical Calcite
Calcium Carbonate (CaCO3)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Yellow Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Bauxite
Bauxite (Mixture of Hydrous Aluminum Oxides)
sedimentary
Chert (Jasper variety)
Silicon dioxide (SiO2)
sedimentary
White Marble
Metamorphosed Limestone (principally CaCO3)
metamorphic
Nephrite Jade
Ca2(Mg, Fe)5Si8O22(OH)2
metamorphic
Banded Sandstone
Arenite (Sandstone with iron oxide banding)
sedimentary
Quartzite Geode (unopened)
SiO2 (Silicon Dioxide)
metamorphic
Carnelian Agate Beads
Silicon Dioxide (SiO2)
gemstone
Chert (or potentially Jasper/Chalcedony)
SiO2 (Silicon Dioxide)
sedimentary