Sandstone
Arenite
Category
Browse sedimentary (man made conglomerate) specimens identified by the Rock Identifier community.
Sandstone
Arenite
Sandstone
Arenite (composed primarily of SiO2)
Limestone
Calcium Carbonate (CaCO3)
Ferruginous Sandstone
Clastic Sedimentary Rock (Iron-rich)
Hematite
Iron Oxide (Fe2O3)
Chert Pebble
Microcrystalline Quartz (SiO2)
Limonite with Hematite
Limonite (FeO(OH)·nH2O) and Hematite (Fe2O3)
Sandstone (likely Siltstone)
Arenite or Siltstone (high SiO2 content)
Brown Chalcedony
Silicon Dioxide (SiO2)
Sandstone
Arenite (Sandstone)
Sandstone
Arenite or Sandstone
Blue Chalcedony
Chalcedony (Silicon Dioxide, SiO2)
Moqui Marble (Shaman Stone)
Iron Oxide Concretion (Limonite/Hematite over Sandstone)
Shale
Shale (clay-rich mudstone)
Coal
Bituminous Coal (organic sedimentary rock)
Green Calcite or Prasiolite (Green Quartz)
Calcium carbonate (CaCO3) or Silicon dioxide (SiO2)
Copper Ore (Malachite and Limonite bearing)
Cuprite, Malachite, and Limonite mixture
Tumbled Agate
Silicon Dioxide (Chalcedony / Quartz)
Agate
Silicon dioxide (Chalcedony), SiO2
Rhodochrosite
Rhodochrosite (MnCO3)
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
Quartz with Inclusions
Silicon Dioxide (SiO2)
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
Galena
Lead Sulfide (PbS)
Tumbled Agate
Silicon dioxide (SiO2)
Clear Quartz (Faceted Crystal)
Silicon Dioxide (SiO2)
Black Onyx
Silicon Dioxide (SiO2) - Chalcedony
Chert / Flint
Microcrystalline Quartz (SiO2)
Quartz (Chalcedony/Agate)
Silicon Dioxide (SiO2)
Yellow Jade (or Carnelian / Chalcedony)
SiO2 (Silicon Dioxide)
Orange Calcite
Calcite (Calcium Carbonate, CaCO3)
Pyrite (or Arsenopyrite / Ore mineral aggregate)
FeS2 (Iron Sulfide)
Barite
Barium sulfate (BaSO4)
Pyrite or Chalcopyrite
Iron sulfide (FeS2) or Copper iron sulfide (CuFeS2)
Magnesite or Howlite (dyed or naturally patterned)
Magnesium carbonate (MgCO3) or Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
Shale
Shale (clay-sized silicate minerals)
Sandstone
Arenite (composed primarily of SiO2)
Septarian Nodule
Septarian Concretion (Calcium Carbonate/Aragonite/Calcite/Siderite)
Sandstone
Sedimentary Rock (Quartz arenite)
Sandstone
Sedimentary rock composed mainly of quartz sand
Ferruginous Sandstone (with Iron Oxide staining)
Clastic Sedimentary Rock - Quartz Arenite/Wacke
Jasper
Microcrystalline quartz (SiO2)