Chalcedony / Agate
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary (Anthropogenic)
Browse sedimentary (anthropogenic) specimens identified by the Rock Identifier community.
Fluorite
Calcium Fluoride (CaF2)
mineral
Caribbean Calcite
Calcium Carbonate (CaCO3) with Aragonite (CaCO3)
sedimentary
Quartz / Milky Quartz
Silicon Dioxide (SiO2)
mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Chalcedony (Moonstone-like Agate)
Silicon Dioxide (SiO₂)
mineral
Kyanite in Quartz
Kyanite (Al2SiO5) with Quartz (SiO2)
metamorphic
Chert (Arrowhead variety)
Chert (SiO2)
sedimentary
Blue Kyanite in Quartz
Kyanite (Al2SiO5)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Yellow Aventurine
Silicon Dioxide with inclusions (SiO2 + Muscovite/Fuchsite)
mineral
Gneiss
Gneiss
metamorphic
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
mineral
Travertine
Calcareous Tufa / Travertine (CaCO3)
sedimentary
Green Kyanite
Kyanite (Al2SiO5)
mineral
Garnet (specifically Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Quartz (Milky/Crystal Variety)
Silicon Dioxide (SiO2)
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Agate with Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Zoisite with Ruby (Anyolite)
Zoisite – Ca2Al3(SiO4)3(OH) with inclusions of Ruby (Al2O3:Cr)
metamorphic
Selenite (Satin Spar)
Gypsum (CaSO4·2H2O)
mineral
Rhodochrosite
Manganese carbonate (MnCO3)
mineral
Satin Spar Selenite
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Fossilized Echinoid (Sea Urchin)
Echinoidea (Class), often found as calcitic fossils
sedimentary
Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Hematite (Iron Ore)
Hematite (alpha-Fe2O3)
mineral
Chalcedony (Agate/Chert)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Aragonite (Banded Calcite / 'Mexican Onyx')
Aragonite (Calcium Carbonate - CaCO3)
mineral
Limonite
Limonite (FeOO·nH2O)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Red Jasper (Brecciated Jasper)
SiO2 (Silicon Dioxide) with Ferric Iron inclusions
sedimentary
Chert (Flint)
Chert (SiO2)
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Botryoidal Chalcedony
Silicon Dioxide (SiO2)
mineral