Limestone (specifically Marl or Chalk)
Calcium Carbonate (CaCO3)
Category
Browse sedimentary (man made) specimens identified by the Rock Identifier community.
Limestone (specifically Marl or Chalk)
Calcium Carbonate (CaCO3)
Sandstone
Arenite
Sandstone
Arenite (composed primarily of SiO2)
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
Sandstone
Arenite (mainly SiO2 with varying cements)
Gray Limestone Fragment
Limestone (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Sandstone with Iron Oxide Staining
Clastic sedimentary rock (primarily SiO2 with Fe2O3 staining)
Weathered sandstone or iron-stained sedimentary stone
Quartz-rich sandstone, commonly arkose or lithic sandstone; composition cannot be confirmed visually
Sandstone (Ferruginous)
Arenite with Iron Oxide cement (SiO2 + Fe2O3)
Fairburn Agate / Agate-bearing Breccia
Cryptocrystalline Quartz (SiO2) within Jasper/Breccia matrix
Rhodochrosite
Manganese Carbonate (MnCO3)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Sandstone
Arenite (composed primarily of SiO2)
Sandstone
Sandstone (clastic sedimentary rock)
Shale
Shale (clay-rich mudstone)
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (primarily SiO2)
Limestone
Limestone (Calcium Carbonate - CaCO3)
Sandstone Pebble
Arenite (SiO2 with various cementing agents)
Clear Calcite
Calcite (Calcium Carbonate, CaCO3)
Green Chert (Jasper)
Silicon Dioxide (SiO2)
Limestone (or Calcite Pebble)
Calcium Carbonate (CaCO3)
Sandstone
Arenite (composed primarily of SiO2)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Limestone
Sedimentary Calcium Carbonate (CaCO3)
Granite Cobble/Pebble
Granite
Limestone
Sedimentary Calcium Carbonate (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Clastic Sedimentary Rock (composed primarily of Quartz: SiO2)
Limestone
Calcium Carbonate (CaCO3)
Green cabochon gemstone, likely aventurine or dyed chalcedony
Indeterminate from image; possible quartz variety (SiO₂), including aventurine quartz or chalcedony
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2)
Sandstone
Arenite (primarily composed of SiO2)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Arenite
Iron-rich quartzite or ironstone fragment
Quartzite dominated by quartz (SiO₂), with iron oxides such as hematite/goethite
Mica-rich schist
Muscovite–biotite schist, commonly quartz-bearing
Sandstone
Arenite (primarily SiO2)
Crushed Limestone
Calcium Carbonate (CaCO3)