Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Category
Mineral Description (Anthropogenic Material)
Browse mineral description (anthropogenic material) specimens identified by the Rock Identifier community.
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Chert (Jasper/Flint variety)
Silicon Dioxide (SiO2)
sedimentary
Red Jasper
Silicon dioxide (SiO2) with iron oxide (Fe2O3) inclusions
sedimentary/mineral
Natural or Cultured Pearl
Calcium Carbonate (Aragonite and Conchiolin), CaCO3
Mineral (Organic)
Pink Cubic Zirconia (CZ)
Zirconium Dioxide (ZrO2)
mineral (synthetic)
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Rough Quartz (Alluvial Pebbles)
Silicon Dioxide (SiO2)
mineral
Diorite (River Cobble)
Intermediate plutonic igneous rock
igneous
Sandstone with Liesegang Rings
Arenite with Iron Oxide Liesegang Banding
sedimentary
Petrified Wood
Silicified Wood (SiO2 - Quartz/Chalcedony replacement)
Mineral / Fossil
Limonite-stained Chert
Silicon Dioxide (SiO2) with Hydrated Iron Oxide (FeO(OH)·nH2O)
sedimentary
Megalodon Shark Tooth (Partial Fossil)
Otodus megalodon (fossilized in Calcium Phosphate/Apatite)
Mineral/Fossil
Jasper with Quartz Vein
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Blue Kyanite
Kyanite (Al2SiO5)
mineral
Sandstone (Quartz Sandstone)
Arenite (primarily SiO2)
sedimentary
Granite
Phaneritic Igneous Rock (composed primarily of Quartz SiO2, Alkali Feldspar (K,Na)AlSi3O8, and Plagioclase Feldspar)
igneous
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Banded Gneiss (with Quartz Vein)
Gneiss (Metamorphic rock of varying mineralogy)
metamorphic
Rose Quartz
Silicon dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Chrysocolla
Hydrated copper silicates (Cu, Al)2H2Si2O5(OH)4·nH2O
mineral
Man-made Synthetic Material (Plastic/Composite)
Acrylonitrile Butadiene Styrene (ABS) or High-Impact Polystyrene (HIPS)
Non-geological / Synthetic
Blue Quartz with Dumortierite/Magnesio-riebeckite inclusions
Quartz (SiO2) containing Dumortierite (Al7(BO3)(SiO4)3O3)
igneous/metamorphic
Laterite
Laterite (no specific mineral formula as it's a rock type)
Sedimentary
Jasper
Silicon Dioxide (SiO2)
mineral
Agate
Silicon Dioxide (SiO2) - Cryptocrystalline Chalcedony
Mineral
Olivine in Basalt (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4 in Vesicular Basalt
igneous
Sandstone (Ferruginous)
Arenite (Fe-rich)
sedimentary
Sugilite
KNa2(Fe,Mn,Al)2Li3Si12O30 (Potassium Sodium Lithium Iron Manganese Aluminum Silicate)
mineral
Sandstone
Arenite
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Amber
Succinite
mineral
Quartz (Milky or White Quartz)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Rough Aquamarine
Beryl (Be₃Al₂Si₆O‑₁•H₂O)
Mineral
Fulonite (Fulgurite-like)
Fulgurite (SiO2 fused silica/lechatelierite)
Metamorphic (Pseudo-igneous)
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone (Ferruginous)
Arenite with Iron oxide staining (SiO2 with Fe2O3)
sedimentary
Petrified Wood
Silicified Wood (SiO2)
mineral
Opalite
Opalescent Glass (SiO2 + coloring agents)
Mineral (Synthetic/Man-made)
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
metamorphic