Rock Identifier

Category

Mineral Based Composite

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

Learn about Mineral Based Composite in the encyclopedia

Pyroxenite

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

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

Amethyst Quartz (Amethyst Geode)

Silicon Dioxide (SiO2) with iron impurities

Granite (Phaneritic Plutonic Felsic Rock (K-Feldspar + Quartz + Plagioclase)) — igneous

Granite

Phaneritic Plutonic Felsic Rock (K-Feldspar + Quartz + Plagioclase)

Blue Sapphire (Corundum (Al2O3)) — mineral

Blue Sapphire

Corundum (Al2O3)

White Topaz (Aluminum Silicate Fluoride Hydroxide; Al2SiO4(F,OH)2) — mineral

White Topaz

Aluminum Silicate Fluoride Hydroxide; Al2SiO4(F,OH)2

Silver Nuggets (Natural or Cast) (Native Silver (Ag)) — mineral

Silver Nuggets (Natural or Cast)

Native Silver (Ag)

Schist (Schist (Crystalline metamorphic rock)) — metamorphic

Schist

Schist (Crystalline metamorphic rock)

Quartz / Quartzite (Silicon Dioxide (SiO2)) — metamorphic

Quartz / Quartzite

Silicon Dioxide (SiO2)

Zebra Jasper (Tumbled Opaque Chalcedony (SiO2)) — sedimentary

Zebra Jasper

Tumbled Opaque Chalcedony (SiO2)

Chrysocolla (Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4 nH2O) — mineral

Chrysocolla

Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4 nH2O

Peacock Ore (Bornite (Cu5FeS4) or Chalcopyrite treated with acid) — mineral

Peacock Ore

Bornite (Cu5FeS4) or Chalcopyrite treated with acid

Sandstone (Ferruginous) (Sandstone (mainly SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Ferruginous)

Sandstone (mainly SiO2 with Fe2O3 staining)

Ferruginous Conglomerate (or Iron-Rich Concrete/Slag) (Clastic Sedimentary (Silicon Dioxide/Iron Oxide matrix)) — sedimentary

Ferruginous Conglomerate (or Iron-Rich Concrete/Slag)

Clastic Sedimentary (Silicon Dioxide/Iron Oxide matrix)

River Cobble (Phyllite or Quartzite) (Metasedimentary Rock (often containing SiO2 or KAl2(AlSi3O10)(OH)2)) — metamorphic

River Cobble (Phyllite or Quartzite)

Metasedimentary Rock (often containing SiO2 or KAl2(AlSi3O10)(OH)2)

Sandstone (Quartz-rich) (Sandstone (SiO2 dominated)) — sedimentary

Sandstone (Quartz-rich)

Sandstone (SiO2 dominated)

Banded Calcite (Calcium Carbonate (CaCO3)) — mineral

Banded Calcite

Calcium Carbonate (CaCO3)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Sodalite (Sodalite (Na8(Al6Si6O24)Cl2)) — mineral

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Green Kyanite (Kyanite (Al2SiO5)) — mineral

Green Kyanite

Kyanite (Al2SiO5)

Red Jasper (Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)) — mineral

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)

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

Amethyst

Amethyst (Silicon Dioxide with iron impurities), SiO2

Polished turquoise (Turquoise — hydrated copper–aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O) — gemstone

Polished turquoise

Turquoise — hydrated copper–aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Marble (Sculpted Statue) (Metamorphic Limestone (composed primarily of Calcite, CaCO3)) — metamorphic

Marble (Sculpted Statue)

Metamorphic Limestone (composed primarily of Calcite, CaCO3)

Granite Glacial Erratic (Intrusive Phaneritic Felsic Rock (Granite)) — igneous

Granite Glacial Erratic

Intrusive Phaneritic Felsic Rock (Granite)

Banded Calcite (often sold as 'Mexican Onyx' or 'Calcite Onyx') (Calcite (Calcium Carbonate, CaCO3)) — sedimentary

Banded Calcite (often sold as 'Mexican Onyx' or 'Calcite Onyx')

Calcite (Calcium Carbonate, CaCO3)

Sandstone Geode (Unbroken) (Siliciclastic sedimentary rock (primarily Quartz)) — sedimentary

Sandstone Geode (Unbroken)

Siliciclastic sedimentary rock (primarily Quartz)

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Sandstone (Arenite (SiO2 principal)) — sedimentary

Sandstone

Arenite (SiO2 principal)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Quartz (Clear/Smoky Geode fragment) (Silicon Dioxide (SiO2)) — mineral

Quartz (Clear/Smoky Geode fragment)

Silicon Dioxide (SiO2)

Pebble (likely Sandstone or Granitic Pebble) (Clastic Sediment (or specific rock type, e.g., Arenite, Granitoid Pebble)) — Rock (likely Sedimentary)

Pebble (likely Sandstone or Granitic Pebble)

Clastic Sediment (or specific rock type, e.g., Arenite, Granitoid Pebble)

Rock (likely Sedimentary)

Sandstone River Pebble (Arenite (SiO2 predominantly)) — sedimentary

Sandstone River Pebble

Arenite (SiO2 predominantly)

Graphite (Graphite (Carbon, C)) — mineral

Graphite

Graphite (Carbon, C)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Turquoise in Matrix (Hydrated copper aluminum phosphate, CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise in Matrix

Hydrated copper aluminum phosphate, CuAl6(PO4)4(OH)8·4H2O

Tree Agate (or Moss Agate), faceted into a crystal tower (Dendritic Agate (Silicon Dioxide, SiO2)) — Mineral

Tree Agate (or Moss Agate), faceted into a crystal tower

Dendritic Agate (Silicon Dioxide, SiO2)

Tumbled chalcedony or quartz-rich stone (Microcrystalline quartz, SiO₂; possibly pale chert or chalcedony) — mineral

Tumbled chalcedony or quartz-rich stone

Microcrystalline quartz, SiO₂; possibly pale chert or chalcedony

Desert Rose (Selenite Rose (Gypsum: CaSO4·2H2O)) — mineral

Desert Rose

Selenite Rose (Gypsum: CaSO4·2H2O)

Micro-Meteorite (Micrometeoroid) (Extraterrestrial Spherule (Silicate or Iron-Nickel)) — mineral

Micro-Meteorite (Micrometeoroid)

Extraterrestrial Spherule (Silicate or Iron-Nickel)

Amethyst (Amethyst (Silicon Dioxide, SiO2)) — mineral

Amethyst

Amethyst (Silicon Dioxide, SiO2)