Limestone
Calcium Carbonate (CaCO3)
Category
Browse man made object (simulant) specimens identified by the Rock Identifier community.
Limestone
Calcium Carbonate (CaCO3)
Specular Hematite (Iron Ore)
Iron(III) oxide (Fe2O3)
Quartz or possibly Jasper/Chert. Looks like a tumbled or water-worn stone.
SiO2 (Silicon Dioxide)
Tumbled Mixed Gemstones and Rocks
Various mineral species including quartz (SiO2) and silicate minerals
Turquoise
Hydrated phosphate of copper and aluminium: CuAl6(PO4)4(OH)8·4H2O
Serpentinite
Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4
Red Dyed Howlite
Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)
Granite
Granite (dominated by Quartz, Alkali Feldspar, and Plagioclase)
Limestone (Micrite/Chalky variety)
Calcium Carbonate (CaCO3)
Granite
Felsic Intrusive Igneous Rock
Quartz with Iron Oxide
SiO2
Schist
Schist (Crystalline metamorphic rock)
Granite Pebble
Granite (Phaneritic intrusive igneous rock)
Ferruginous Sandstone
Sandstone, Iron-rich
Basalt
Basalt
Sea Glass
Silica (SiO2) - Amorphous
Quartz with impurities or Host Rock
SiO2 (Silicon Dioxide) with mixed silicates
Weathered, iron-stained rhyolite pebble (possibly rhyolitic volcanic breccia)
Rhyolite, a felsic volcanic rock; mainly quartz and alkali feldspar with minor plagioclase, altered mafic minerals, and iron-oxide staining
Quartzite
Quartzite (SiO2)
Porphyritic Basalt or Diabase with Plagioclase Phenocrysts
Porphyritic Basalt or Diabase; Mineral: Plagioclase Feldspar
Granodiorite
Granodiorite (phaneritic intrusive igneous rock)
Jasper
Silicon Dioxide (SiO2)
Sandstone
Clastic Sedimentary Rock
Limestone
Calcium Carbonate (CaCO3)
Limestone (River Pebble)
Calcite (Calcium Carbonate) - CaCO3
Milky Quartz
Silicon dioxide (SiO2)
Granite
Phaneritic plutonic rock (Quartz, Feldspar, Mica)
Rough Apatite in Matrix
Fluorapatite / Chlorapatite / Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))
Granite
Granite (Felsic Plutonic Rock)
Granite
Granite (Felsic Plutonic Rock)
Basalt
Basalt (Mafic volcanic rock)
Sandstone (lithic)
Lithic Wacke / Arenite
Quartz Druzy on Matrix
SiO2
Turquoise
Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O
Granite
Granite
Granite
Granite (Felsic Plutonic Rock)
Chert (Fossiliferous)
Silicon dioxide (SiO2)
Quartz-bearing granite or granitic pegmatite
Felsic intrusive rock, chiefly quartz (SiO₂), feldspar, and minor mica
Chert (Chalk-associated Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Sandstone (Ferruginous)
Arenite (Fe2O3 rich)
Limestone
Calcium Carbonate (CaCO3)
Sandstone
Arenite