Orange Calcite point
Calcite (Calcium Carbonate, CaCO3)
mineral
Category
Sedimentary Or Mineral
Browse sedimentary or mineral specimens identified by the Rock Identifier community.
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Quartz Geode
Silicon Dioxide (SiO2)
mineral
Botryoidal Lace Agate
Agate (Silicon Dioxide, SiO2)
mineral
Geode or Concretion
Silica-based Concretion / Quartz Geode
sedimentary
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Magnetite
Magnetite (Iron(II,III) oxide, Fe3O4)
mineral
Banded Calcite (often sold as Caribbean Calcite or Pink Calcite)
Calcium Carbonate (CaCO3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Asphalt Concrete
Bituminous Concrete
sedimentary (artificial)
Ironstone Concretion (Coprolite-like)
Goethite/Hematite Siderite Spheroid (FeCO3 or FeO(OH))
sedimentary
Blue Chalcedony
Chalcedony (cryptocrystalline Silicon Dioxide - SiO2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Turquoise (Rough)
Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Banded Flint (Chert)
Silicon Dioxide (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Satin Spar (Selenite)
Gypsum (CaSO4·2H2O)
mineral
Angelite
Anhydrous Calcium Sulfate (CaSO4)
mineral
Carnelian Agate
Carnelian (Chalcedony / Silicon Dioxide SiO2)
mineral
Magnetite / Iron Ore
Magnetite (Fe3O4)
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Howlite
Howlite (Calcium borosilicate hydroxide, Ca2B5SiO9(OH)5)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Marble
Recrystallized Calcite (CaCO3) or Dolomite (CaMg(CO3)2)
metamorphic
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Quartz Pebble (likely Chalcedony or Quartzite)
Silicon Dioxide (SiO2)
mineral
Fancy Jasper
Silicon Dioxide (SiO₂)
sedimentary
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Celestine (Celestite)
Strontium sulfate (SrSO4)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Zebra Jasper
Silicon Dioxide (SiO2) with inclusions
sedimentary
Psilomelane (Manganese Ore)
Psilomelane (Ba,H2O)2Mn5O10
mineral
Sandstone
Arenite (SiO2 composition dominant)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Yellow Jasper / Chalcedony
Silicon Dioxide (SiO2) with iron inclusions
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary