Carnelian Agate
Silicon Dioxide (SiO2)
Category
Browse mineral and sedimentary specimens identified by the Rock Identifier community.
Carnelian Agate
Silicon Dioxide (SiO2)
Blue Calcite
Calcium Carbonate (CaCO3)
Geode (unopened nodule)
Silicon Dioxide (SiO2) Nodule
Yellow Calcite
Calcium Carbonate (CaCO3)
Calcite
Calcium Carbonate (CaCO3)
Quartz Geode Fragment
Silicon Dioxide (SiO2)
Hematite
Iron(III) oxide (Fe2O3)
Agate (Chalcedony)
Silicon Dioxide (SiO2)
Quartz Geode
Silicon Dioxide (SiO2)
Pyrite (Iron Pyrites)
Iron Sulfide (FeS2)
Optical Calcite (Iceland Spar)
Calcite (Calcium Carbonate, CaCO3)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Pyrite
Iron Sulfide (FeS2)
Limonite (Iron Stone/Goethite)
Limonite (mixture of hydrated iron oxides, primarily Goethite: α-FeO(OH))
Pyrite
Iron Disulfide (FeS2)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Pyrite
Iron Sulfide (FeS2)
Fluorite
Calcium Fluoride (CaF2)
Quartz (Microcrystalline/Gravel)
Silicon Dioxide (SiO2)
Sandstone (Banded)
Clastic Sedimentary Rock (composed of SiO2, CaCO3, or Fe2O3 cement)
Blue Celestite
Strontium Sulfate (SrSO4)
Blue Chalcedony
Cryptocrystalline Quartz (SiO2)
Chalcedony (Agate/Carnelian)
Cryptocrystalline Quartz (SiO2)
Orange Quartz (Tangerine Quartz)
Silicon Dioxide (SiO2) with Hematite inclusions
Jasper
Silicon dioxide, SiO2
Red Sandstone
Arenite (Ferruginous Sandstone)
Sandstone (River Rock)
Arenite (SiO2 principal component)
Sandstone
Arenite (primarily Quartz Sandstone)
Sandstone
Arenite
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 oxides)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Sandstone
Arenite (primarily SiO2)
Red Sandstone
Arenite (Ferruginous Sandstone)
Sandstone
Arenite (composed primarily of SiO2)
Calcite in Matrix
Calcium Carbonate (CaCO3) on Sedimentary Host Rock
Limonite (Ironstone)
Limonite (mixture of hydrated iron(III) oxide-hydroxides)
Sandstone (with Iron Staining)
Clastic Sedimentary Rock (primarily SiO2)
Sandstone
Arenite (primarily SiO2)
Sandstone (Weathered Pebble)
Arenite (composed primarily of SiO2)
Sandstone
Arenite (SiO2 principal component)
Sandstone (Red/Brown Variety)
Arenite (SiO2 with iron oxide impurities)
Sandstone (Pebble/Cobble)
Arenite (primarily SiO2)