Rock Identifier

Category

Mineral (Processed Alloy)

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

Porphyritic Basalt (with Quartz or Calcite inclusion) (Porphyritic Basalt (Matrix: SiO2/MgO/FeO, Phenocryst: likely Quartz or Calcite)) — igneous

Porphyritic Basalt (with Quartz or Calcite inclusion)

Porphyritic Basalt (Matrix: SiO2/MgO/FeO, Phenocryst: likely Quartz or Calcite)

Sandstone (Ferruginous) (Sandstone (SiO2 with iron oxide inclusions)) — sedimentary

Sandstone (Ferruginous)

Sandstone (SiO2 with iron oxide inclusions)

Quartz Geode in Chert/Limestone Matrix (Silicon Dioxide (SiO2) within Sedimentary Host Rock) — sedimentary

Quartz Geode in Chert/Limestone Matrix

Silicon Dioxide (SiO2) within Sedimentary Host Rock

Mica Schist (Mica Schist (Quartz-Biotite-Muscovite Schist)) — metamorphic

Mica Schist

Mica Schist (Quartz-Biotite-Muscovite Schist)

Red Jasper (Chert) (Silicon Dioxide (SiO2) with impure Iron Oxides) — sedimentary

Red Jasper (Chert)

Silicon Dioxide (SiO2) with impure Iron Oxides

Jasper with Quartz Druzy (Silicon Dioxide (SiO2)) — sedimentary

Jasper with Quartz Druzy

Silicon Dioxide (SiO2)

Picture Jasper (Silicon Dioxide (SiO2) - Opaque Chert/Quartzite variety) — sedimentary

Picture Jasper

Silicon Dioxide (SiO2) - Opaque Chert/Quartzite variety

Red Jasper (Silicon Dioxide (SiO2) with impure Iron oxides) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with impure Iron oxides

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)) — metamorphic

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)

Aventurine (Aventurine Quartz (SiO2 with inclusions)) — Mineral

Aventurine

Aventurine Quartz (SiO2 with inclusions)

Pink Sapphire (Corundum (Al2O3 with chromium and iron traces)) — gemstone

Pink Sapphire

Corundum (Al2O3 with chromium and iron traces)

Quartz (River Pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Druzy Quartz Geode (Vug) (Silicon Dioxide (SiO2)) — mineral

Druzy Quartz Geode (Vug)

Silicon Dioxide (SiO2)

Magnetite (likely in Hematite or Ironstone) (Magnetite (Fe3O4)) — mineral

Magnetite (likely in Hematite or Ironstone)

Magnetite (Fe3O4)

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Schist (Mica Schist (primarily Muscovite and Quartz)) — metamorphic

Schist

Mica Schist (primarily Muscovite and Quartz)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Yellow Beryl (Heliodor) (Beryllium aluminum silicate (Be3Al2Si6O18)) — mineral

Yellow Beryl (Heliodor)

Beryllium aluminum silicate (Be3Al2Si6O18)

Quartz (Milky or Druzy variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Druzy variety)

Silicon Dioxide (SiO2)

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Jasper and Quartz Breccia (Silicified breccia (SiO2)) — sedimentary

Jasper and Quartz Breccia

Silicified breccia (SiO2)

Quartz Druze (Crystalline Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz Druze (Crystalline Quartz)

Silicon Dioxide (SiO2)

Quartz with Hematite (Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)) — mineral

Quartz with Hematite

Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3)

Petrified Wood Agate (Silicified Wood (primarily SiO2)) — fossil

Petrified Wood Agate

Silicified Wood (primarily SiO2)

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

Ferruginous Quartz

Silicon Dioxide (SiO2) with Hematite/Limonite impurities

Aquamarine (Beryl (Be3Al2Si6O18)) — mineral

Aquamarine

Beryl (Be3Al2Si6O18)

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

Petrified Wood

Silicified Wood (primarily SiO2)

Petrified Wood (Silicified wood (primarily Silicon Dioxide, SiO2)) — metamorphic

Petrified Wood

Silicified wood (primarily Silicon Dioxide, SiO2)

Granite (Granite (compositionally: Quartz, Feldspar, Mica)) — igneous

Granite

Granite (compositionally: Quartz, Feldspar, Mica)

Green Aventurine (Quartz containing Fuchsite (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)) — mineral

Green Aventurine

Quartz containing Fuchsite (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Tiger's Eye (Rough) (Pseudomorph of Quartz after Crocidolite (SiO2)) — mineral

Tiger's Eye (Rough)

Pseudomorph of Quartz after Crocidolite (SiO2)

Picture Jasper (Silicon Dioxide (SiO2) with mineral inclusions) — sedimentary

Picture Jasper

Silicon Dioxide (SiO2) with mineral inclusions

Bacan Stone (Chrysocolla-in-Chalcedony) (Chrysocolla in Chalcedony (SiO2 with (Cu, Al)2H2Si2O5(OH)4·nH2O)) — mineral

Bacan Stone (Chrysocolla-in-Chalcedony)

Chrysocolla in Chalcedony (SiO2 with (Cu, Al)2H2Si2O5(OH)4·nH2O)

Zebra Rock / Zebra Marble (Banded Limestone-Marble Transition) — metamorphic

Zebra Rock / Zebra Marble

Banded Limestone-Marble Transition

Petrified Wood (Silicified wood (Quartz/Chalcedony replacement) SiO2) — sedimentary

Petrified Wood

Silicified wood (Quartz/Chalcedony replacement) SiO2

Sandstone with Lichen (Arenite (SiO2 based) with biological weathering) — sedimentary

Sandstone with Lichen

Arenite (SiO2 based) with biological weathering

Beach Pebbles and Quartz Aggregates (Quartz / Calcite Beach Pebbles (SiO2 / CaCO3)) — sedimentary

Beach Pebbles and Quartz Aggregates

Quartz / Calcite Beach Pebbles (SiO2 / CaCO3)

Aquamarine (Tumbled) (Beryl (Be3Al2Si6O18)) — gemstone

Aquamarine (Tumbled)

Beryl (Be3Al2Si6O18)

Blue Apatite (Fluorapatite (Ca5(PO4)3F)) — mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

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

Serpentinite

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

Cullet Glass (Slag Glass) (Amorphous Silicon Dioxide (Industrial byproduct)) — mineraloid

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (Industrial byproduct)

Petrified Wood (Silicified wood (SiO2)) — fossil

Petrified Wood

Silicified wood (SiO2)