Rock Identifier

Category

Mineral Based Composite

Browse mineral based composite specimens identified by the Rock Identifier community.

Pyrite (Iron Pyrite (FeS2)) — Mineral

Pyrite

Iron Pyrite (FeS2)

Amethyst Geode (Amethyst (Silicon Dioxide), Formula: SiO2) — mineral

Amethyst Geode

Amethyst (Silicon Dioxide), Formula: SiO2

Water and Silt (Sedimentary Environment) (Suspended Sediment / H2O (dihydrogen monoxide)) — sedimentary

Water and Silt (Sedimentary Environment)

Suspended Sediment / H2O (dihydrogen monoxide)

Turquoise (Turquoise (Hydrated phosphate of copper and aluminium) - CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise

Turquoise (Hydrated phosphate of copper and aluminium) - CuAl6(PO4)4(OH)8·4H2O

Scoria (Vesicular Basalt) (Vesicular Basalt) — igneous

Scoria (Vesicular Basalt)

Vesicular Basalt

Banded Agate (Sedimentary Cryptocrystalline Quartz (SiO2)) — mineral

Banded Agate

Sedimentary Cryptocrystalline Quartz (SiO2)

Native Copper (Native Copper (Cu)) — mineral

Native Copper

Native Copper (Cu)

Amethyst Geode (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst Geode

Silicon Dioxide (SiO2) with iron impurities

Native Gold (Gold (Au)) — mineral

Native Gold

Gold (Au)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Granite (Granite (a plutonic igneous rock)) — Igneous

Granite

Granite (a plutonic igneous rock)

Gold Ore / Native Gold (Native Gold (Au)) — mineral

Gold Ore / Native Gold

Native Gold (Au)

Gold (Gold (Au)) — mineral

Gold

Gold (Au)

Gold (Native Gold (Au)) — mineral

Gold

Native Gold (Au)

Bloodstone (also known as Heliotrope) (Silicon Dioxide (SiO2) - variety of Chalcedony) — mineral

Bloodstone (also known as Heliotrope)

Silicon Dioxide (SiO2) - variety of Chalcedony

Sandstone (Arenite (SiO2 based with quartz, feldspar, or lithic fragments)) — sedimentary

Sandstone

Arenite (SiO2 based with quartz, feldspar, or lithic fragments)

Concrete with Aggregate (Composite construction material; primary matrix is Calcium Silicate Hydrate (C-S-H)) — anthropogenic (human-made) sedimentary-like material

Concrete with Aggregate

Composite construction material; primary matrix is Calcium Silicate Hydrate (C-S-H)

anthropogenic (human-made) sedimentary-like material

Sandstone (Sandstone (composed primarily of sand-sized minerals or rock grains)) — sedimentary

Sandstone

Sandstone (composed primarily of sand-sized minerals or rock grains)

Fluorite (Fluorite (Calcium Fluoride, CaF2)) — mineral

Fluorite

Fluorite (Calcium Fluoride, CaF2)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Quartz (Silicon Dioxide (SiO₂)) — Mineral

Quartz

Silicon Dioxide (SiO₂)

Diamond (Native Carbon (C)) — mineral

Diamond

Native Carbon (C)

Bauxite (Alumina-rich rock (consisting of Gibbsite, Boehmite, and Diaspore)) — sedimentary

Bauxite

Alumina-rich rock (consisting of Gibbsite, Boehmite, and Diaspore)

Turquenite (Dyed Howlite) (Dyed Ca2B5SiO9(OH)5 (Calcium Borosilicate Hydroxide)) — mineral

Turquenite (Dyed Howlite)

Dyed Ca2B5SiO9(OH)5 (Calcium Borosilicate Hydroxide)

Quartz (Quartz (SiO2 - Silicon Dioxide)) — Mineral

Quartz

Quartz (SiO2 - Silicon Dioxide)

Opalite (Synthetic Opalised Glass) — Mineral (Synthetic / Man-made)

Opalite

Synthetic Opalised Glass

Mineral (Synthetic / Man-made)

Gold Ore in Quartz/Matrix (Native Gold (Au) in Quartz (SiO2) matrix) — mineral

Gold Ore in Quartz/Matrix

Native Gold (Au) in Quartz (SiO2) matrix

Wallboard/Drywall (Gypsum-based) (Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O) — sedimentary

Wallboard/Drywall (Gypsum-based)

Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Gold Ore (Native Gold (Au)) — mineral

Gold Ore

Native Gold (Au)

Gold Nugget / Flake (Native Gold (Au)) — mineral

Gold Nugget / Flake

Native Gold (Au)

Amethyst (SiO2 (Silicon Dioxide)) — Mineral

Amethyst

SiO2 (Silicon Dioxide)

Man-made Synthetic Material (Plastic/Composite) (Acrylonitrile Butadiene Styrene (ABS) or High-Impact Polystyrene (HIPS)) — Non-geological / Synthetic

Man-made Synthetic Material (Plastic/Composite)

Acrylonitrile Butadiene Styrene (ABS) or High-Impact Polystyrene (HIPS)

Non-geological / Synthetic

Sandstone (Arenite (SiO2 based with primary clasts 0.0625 to 2 mm)) — sedimentary

Sandstone

Arenite (SiO2 based with primary clasts 0.0625 to 2 mm)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Opal (Hydrated silica (SiO2·nH2O)) — mineraloid

Opal

Hydrated silica (SiO2·nH2O)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

White Quartz (Milky Quartz) (Silicon Dioxide (SiO2)) — mineral

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Native Gold (in earring form) (Gold (Au)) — mineral

Native Gold (in earring form)

Gold (Au)

Gold (Native Gold (Au)) — mineral

Gold

Native Gold (Au)

Banded Slate or Siltstone with Quartz/Calcite Veins (Protolith-derived Siltstone or Slate (varies based on degree of metamorphism)) — metamorphic

Banded Slate or Siltstone with Quartz/Calcite Veins

Protolith-derived Siltstone or Slate (varies based on degree of metamorphism)

Sandstone concretion (Ironstone-stained) (Arenite with Limonite/Hematite staining (Silica-based with Iron Oxides)) — sedimentary

Sandstone concretion (Ironstone-stained)

Arenite with Limonite/Hematite staining (Silica-based with Iron Oxides)