Fluorite
Calcium Fluoride (CaF2)
Category
Browse anthropogenic (man made material mimicking sedimentary rock) specimens identified by the Rock Identifier community.
Fluorite
Calcium Fluoride (CaF2)
Quartzite Pebble
Metamorphic Quartz (SiO2)
Sandstone
Arenite (Siliclastic sedimentary rock), SiO2 + various minerals
Granite
Granite (Phaneritic Quartz-Feldspar Felsic Rock)
Calcite (commonly referred to as Orange Calcite or Honey Calcite given its color)
Calcite
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement
Sandstone (Ferruginous)
Arenite with Iron Oxide matrix
Red Jasper
Red Jasper (variety of Chalcedony, SiO₂)
Black Jasper (Black Stone / River Pebble)
Silicon Dioxide (SiO₂), Opaque variety of Chalcedony
Sandstone
Arenite (primarily SiO2)
Chert (Nodular Chert)
Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)
Sandstone (likely Iron-rich or Arkosic)
Arenite (SiO2 with FeO(OH) or Fe2O3 staining)
Sandstone
Arenite (SiO2 + various cementing minerals)
Granite
Phaneritic plutonic rock (Quartz + Feldspar + Mica)
Shungite
Non-crystalline carbon (allotrope of carbon)
Limestone
Calcium Carbonate (CaCO3)
Sandstone (likely with Quartz Veining)
Arenite (primarily SiO2)
Limestone
Calcareous Sedimentary Rock (CaCO3)
Opalite
Synthetic Opalised Glass
Ferruginous Sandstone (Red Sandstone)
Arenite with Hematite/Limonite cement
Sandstone (likely Calcareous or Micaceous)
Clastic sedimentary rock (primarily Quartz with Cementing Agents)
Sandstone (Ferruginous)
Clastic Sedimentary Rock (primarily SiO2 with Fe2O3 staining)
Chalcedony (Agate)
Silicon Dioxide (SiO2)
Limonite / Ironstone Nodule
Limonite (Hydrated iron(III) oxide-hydroxide), FeO(OH)·nH2O
Sandstone
Arenite
Calcite
Calcite (CaCO3)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Arenite (primarily SiO2)
Concretion
Various mineral compositions, typically carbonate or iron oxide cemented sediment
Sandstone (with Limonite staining)
Arenite (primarily SiO2 with FeO(OH)·nH2O)
Sandstone (Ferruginous)
Arenite (Fe-oxide cemented)
Sandstone (lithic wacke)
Arenite / Lithic Wacke (mostly SiO2 with rock fragments)
Sandstone
Arenite (primarily SiO2)
Sandstone (Ferruginous)
Arenite (with Iron Oxide)
Granite
Phaneritic Felsic Igneous Rock
Schist
Mica Schist (primarily consisting of muscovite, biotite, and quartz)
Sandstone (Quartzose)
Arenite (primarily SiO2)
Sandstone
Clastic sedimentary rock (primarily SiO2)
Coarse Sandstone
Arenite (SiO2 based)
Chert (Flint)
Chert (microcrystalline quartz)
Granite
Phaneritic Felsic Igneous Rock
Crushed Limestone Aggregate
Limestone (Calcium Carbonate, CaCO3)