Clear Quartz
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary (Fossil)
Browse sedimentary (fossil) specimens identified by the Rock Identifier community.
Red Jasper
Silicon Dioxide (SiO2) with Hematite inclusions
mineral
Green Kyanite
Kyanite (Al2SiO5)
mineral
Yellow Aventurine
Silicon Dioxide with inclusions (SiO2 + Muscovite/Fuchsite)
mineral
Quartz (Milky/Crystal Variety)
Silicon Dioxide (SiO2)
mineral
Chert (Arrowhead variety)
Chert (SiO2)
sedimentary
Blue Kyanite in Quartz
Kyanite (Al2SiO5)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Gneiss
Gneiss
metamorphic
Travertine
Calcareous Tufa / Travertine (CaCO3)
sedimentary
Chalcedony / Agate
Silicon Dioxide (SiO2)
mineral
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
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Agate with Druzy Quartz
Silicon Dioxide (SiO2)
mineral
Hematite (Iron Ore)
Hematite (alpha-Fe2O3)
mineral
Chert (Flint)
Chert (SiO2)
sedimentary
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
Zoisite with Ruby (Anyolite)
Zoisite – Ca2Al3(SiO4)3(OH) with inclusions of Ruby (Al2O3:Cr)
metamorphic
Selenite (Satin Spar)
Gypsum (CaSO4·2H2O)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Red Jasper (Brecciated Jasper)
SiO2 (Silicon Dioxide) with Ferric Iron inclusions
sedimentary
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Botryoidal Chalcedony
Silicon Dioxide (SiO2)
mineral
Rhodochrosite
Manganese carbonate (MnCO3)
mineral
Satin Spar Selenite
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Muscovite Schist with Quartz
KAl2(AlSi3O10)(OH)2 in Schistose matrix
metamorphic
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Chalcedony (Agate/Chert)
Silicon Dioxide (SiO2)
mineral
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
Sandstone (River Pebble)
Arenite (SiO2 based)
sedimentary
Chert (Common Opal variant)
Silicon Dioxide (SiO2)
sedimentary