Rock Identifier

Category

Mineral (Processed Alloy)

Browse mineral (processed alloy) specimens identified by the Rock Identifier community.

Greenschist (Greenstone) (Greenschist) — metamorphic

Greenschist (Greenstone)

Greenschist

Petrified Wood (Silicified Wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

Lapis Lazuli (Lazurite-dominant rock, (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2) — metamorphic

Lapis Lazuli

Lazurite-dominant rock, (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2

Black Onyx (Silicon Dioxide (SiO2) with cryptocrystalline structure) — mineral

Black Onyx

Silicon Dioxide (SiO2) with cryptocrystalline structure

Chert (often called Flint) (Chert (Microcrystalline Silicon Dioxide, SiO2)) — sedimentary

Chert (often called Flint)

Chert (Microcrystalline Silicon Dioxide, SiO2)

Yellow Quartz (Citrine-colored Quartz) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine-colored Quartz)

Silicon Dioxide (SiO2)

Ferruginous Quartz (Silicon Dioxide (SiO2) with Hematite/Limonite impurities) — mineral

Ferruginous Quartz

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Quartz with Pyrite inclusions (Silicon Dioxide (SiO2) with Iron Sulfide (FeS2) inclusions) — mineral

Quartz with Pyrite inclusions

Silicon Dioxide (SiO2) with Iron Sulfide (FeS2) inclusions

Rutilated Quartz (Quartz (SiO2) with Rutile (TiO2) inclusions) — Mineral

Rutilated Quartz

Quartz (SiO2) with Rutile (TiO2) inclusions

Milky Quartz (Silicon Dioxide (SiO₂)) — mineral

Milky Quartz

Silicon Dioxide (SiO₂)

Carborundum (Silicon Carbide) (Silicon Carbide (SiC) / Moissanite (natural form)) — mineral

Carborundum (Silicon Carbide)

Silicon Carbide (SiC) / Moissanite (natural form)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Unknown Organic Object (likely a berry or fruit) (Not applicable; this is not a geological specimen. If it were a cranberry, its scientific name would be Vaccinium macrocarpon; if a cherry, it would be Prunus avium or Prunus cerasus.) — Organic Material (likely a fruit or berry)

Unknown Organic Object (likely a berry or fruit)

Not applicable; this is not a geological specimen. If it were a cranberry, its scientific name would be Vaccinium macrocarpon; if a cherry, it would be Prunus avium or Prunus cerasus.

Organic Material (likely a fruit or berry)

Greenstone / Serpentinite (Serpentinite (complex of Mg, Fe, Ni, Al, Zn, Mn silicate minerals including Antigorite, Lizardite, and Chrysotile)) — metamorphic

Greenstone / Serpentinite

Serpentinite (complex of Mg, Fe, Ni, Al, Zn, Mn silicate minerals including Antigorite, Lizardite, and Chrysotile)

Basalt River Rock (Basalt (Aphanitic Mafic Igneous Rock)) — igneous

Basalt River Rock

Basalt (Aphanitic Mafic Igneous Rock)

Greisen (Quartz-Muscovite-Turretine Rock) (Greisen) — Metamorphic Rock

Greisen (Quartz-Muscovite-Turretine Rock)

Greisen

Metamorphic Rock

Included Quartz (Garden Quartz / Lodolite) (Quartz (SiO2) with various mineral inclusions) — Mineral

Included Quartz (Garden Quartz / Lodolite)

Quartz (SiO2) with various mineral inclusions

Serpentinite (Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4) — metamorphic

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

River Stone (likely Mudstone or Siltstone) (Lutite (Clastic sedimentary rock composed of clay and silt-sized particles)) — sedimentary

River Stone (likely Mudstone or Siltstone)

Lutite (Clastic sedimentary rock composed of clay and silt-sized particles)

Granite (Granite (a felsic intrusive igneous rock)) — Igneous Rock

Granite

Granite (a felsic intrusive igneous rock)

Quartz River Pebbles (Silicon Dioxide (SiO2)) — sedimentary

Quartz River Pebbles

Silicon Dioxide (SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Glacial Cobble with Granite Inclusion (Porphyritic Basalt or Andesite containing Granitic Xenolith) — igneous

Glacial Cobble with Granite Inclusion

Porphyritic Basalt or Andesite containing Granitic Xenolith

Serpentinite (Serpentinite (composed largely of serpentine group minerals including Antigorite, Lizardite, or Chrysotile)) — metamorphic

Serpentinite

Serpentinite (composed largely of serpentine group minerals including Antigorite, Lizardite, or Chrysotile)

Red Sandstone (Arenite (primarily Quartz with Hematite cement)) — sedimentary

Red Sandstone

Arenite (primarily Quartz with Hematite cement)

Fossiliferous Chert (with Brachiopod or Mollusk fragments) (Silicon dioxide (SiO2) with Calcium Carbonate (CaCO3) inclusions) — sedimentary

Fossiliferous Chert (with Brachiopod or Mollusk fragments)

Silicon dioxide (SiO2) with Calcium Carbonate (CaCO3) inclusions

Vesicular Basalt (or Scoraceous Basalt) (Basalt (Vesicular texture)) — igneous

Vesicular Basalt (or Scoraceous Basalt)

Basalt (Vesicular texture)

Quartzite (Quartzite (Primary mineral: Quartz, SiO2)) — metamorphic

Quartzite

Quartzite (Primary mineral: Quartz, SiO2)

Clear Quartz (Rock Crystal) (Quartz (SiO₂)) — Mineral

Clear Quartz (Rock Crystal)

Quartz (SiO₂)

Ferruginous Quartz (Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3/FeO(OH)) inclusions) — mineral

Ferruginous Quartz

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3/FeO(OH)) inclusions

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

Amethyst Quartz Druse

Silicon Dioxide (SiO2) with iron impurities

Build-A-Bear Plush (Non-Geological) (Polyester fibers (C10H8O4)n and Synthetic Polymers) — Anthropogenic / Non-mineral

Build-A-Bear Plush (Non-Geological)

Polyester fibers (C10H8O4)n and Synthetic Polymers

Anthropogenic / Non-mineral

Zebra Jasper (Silicon Dioxide (SiO2) - Macro-crystalline Quartz/Chert with impurities) — sedimentary

Zebra Jasper

Silicon Dioxide (SiO2) - Macro-crystalline Quartz/Chert with impurities

Jasper with Agate Inclusions (Silicon Dioxide (SiO2) - variety of Quartz/Chert) — sedimentary

Jasper with Agate Inclusions

Silicon Dioxide (SiO2) - variety of Quartz/Chert

Porphyritic Pink Granite (Phaneritic Porphyroid Granite) — igneous

Porphyritic Pink Granite

Phaneritic Porphyroid Granite

Sandstone (Quartzite-rich Cobble) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (Quartzite-rich Cobble)

Clastic sedimentary rock (primarily SiO2)

Iron Slag (Anthropogenic Vitreous Silicate (Byproduct of Smelting)) — Mineral-like byproduct

Iron Slag

Anthropogenic Vitreous Silicate (Byproduct of Smelting)

Mineral-like byproduct

Tiger's Eye (Tiger's Eye (a variety of Chalcedony, which is cryptocrystalline quartz). Chemical Formula: SiO2 with inclusions of crocidolite fibers.) — Mineral

Tiger's Eye

Tiger's Eye (a variety of Chalcedony, which is cryptocrystalline quartz). Chemical Formula: SiO2 with inclusions of crocidolite fibers.

Rutilated Quartz (beads) (SiO2 with TiO2 inclusions (Titanium Dioxide inclusions within Quartz)) — Mineral

Rutilated Quartz (beads)

SiO2 with TiO2 inclusions (Titanium Dioxide inclusions within Quartz)

Talc (Talc (Mg₃Si₄O₁₀(OH)₂)) — Mineral

Talc

Talc (Mg₃Si₄O₁₀(OH)₂)

Red Jasper (Opaque Chalcedony) (Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions) — mineral

Red Jasper (Opaque Chalcedony)

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

Blue Goldstone (Aventurine glass (Synthetic borosilicate glass with cobalt and metallic inclusions)) — man-made glass

Blue Goldstone

Aventurine glass (Synthetic borosilicate glass with cobalt and metallic inclusions)