Banded sandstone pebble
Quartz-rich lithic sandstone; exact provenance and composition require testing
sedimentary
Category
Sedimentary Or Mineral
Browse sedimentary or mineral specimens identified by the Rock Identifier community.
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Hematite
Hematite (Fe2O3)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Mixed Gemstone and Mineral Collection
Mixed Silica and Carbonate minerals (SiO2, CaSO4·2H2O, etc.)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Limonite
FeO(OH)•nH2O
mineral
Hematite (Botryoidal / Kidney Ore)
Iron Oxide (Fe2O3)
mineral
Botryoidal Goethite
Goethite (α-Fe3+O(OH))
mineral
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrated iron(III) oxide-hydroxide)
mineral
Weathered brown rock, likely sandstone or iron-rich sedimentary stone
Indeterminate siliciclastic rock; likely quartz-rich sandstone with iron-oxide cement
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Fossilized Shell
Invertebrate fossil (phylum Mollusca)
fossil
Feldspar
Aluminosilicate (KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8)
mineral
Red Sandstone with Quartz Vein
Sedimentary Quartz Arenite with SiO2 vein
sedimentary
Mixed Rock Collection
Polymineralic aggregate
sedimentary
Brachiopod Fossil in Limestone
Phylum Brachiopoda (likely Order Spiriferida), CaCO3 (Calcite)
sedimentary
Apatite
Calcium phosphate fluorapatite, Ca5(PO4)3(F,Cl,OH)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Jasper or Agate
Silicon dioxide (SiO2)
Mineral
Geode with Quartz and Iron Oxide
Silicon dioxide with iron oxide inclusions (SiO2)
sedimentary
Celestite
Celestine (SrSO4)
mineral
Red Sandstone
Arenite (SiO2 with Fe2O3)
sedimentary
Sandstone (Pebble)
Sandstone
sedimentary
Red Jasper
Silicon Dioxide (SiO2) with Iron impurities
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Halite
Sodium Chloride (NaCl)
mineral
Breccia
Sedimentary Breccia
sedimentary
Shale
Sedimentary pelitic rock
sedimentary
Sandstone
Sedimentary Rock (Quartzose Sandstone)
sedimentary
Shale or Siltstone
Fine-grained siliciclastic sedimentary rock
sedimentary
Geode
Silicon dioxide (Quartz/Chalcedony nodule)
sedimentary
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite (Fools Gold)
Iron Disulfide (FeS2)
mineral
Calcite
Calcium Carbonate (CaCO3)
mineral
Geode (Unopened)
Quartz/Chalcedony concretion
sedimentary
Quartz (Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Snow)
Silicon Dioxide (SiO2)
mineral