Rock Identifier

Category

Mineraloid (Human Made Geological Specimen)

Browse mineraloid (human made geological specimen) specimens identified by the Rock Identifier community.

Chert / Flint (Silicon Dioxide (SiO2)) — sedimentary

Chert / Flint

Silicon Dioxide (SiO2)

Pink quartz bead strand (likely rose quartz or pink dyed quartz) (Quartz, silicon dioxide (SiO₂); probable rose quartz variety, possibly dyed or treated quartz/chalcedony) — mineral

Pink quartz bead strand (likely rose quartz or pink dyed quartz)

Quartz, silicon dioxide (SiO₂); probable rose quartz variety, possibly dyed or treated quartz/chalcedony

Sandstone with Iron Oxide (Arenite (SiO2 with Fe2O3 inclusions)) — sedimentary

Sandstone with Iron Oxide

Arenite (SiO2 with Fe2O3 inclusions)

Weathered gray-green pebble (Indeterminate; possibly altered basalt, serpentinite, or a greenish metamorphic rock) — mineral

Weathered gray-green pebble

Indeterminate; possibly altered basalt, serpentinite, or a greenish metamorphic rock

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Clear Quartz (SiO2 (Silicon Dioxide)) — mineral

Clear Quartz

SiO2 (Silicon Dioxide)

Sandstone with Manganese Oxide Patina (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone with Manganese Oxide Patina

Clastic Sedimentary Rock (primarily SiO2)

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Banded Gneiss (Gneiss (High-grade Regional Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Oolitic Chert (Ooidal Microcrystalline Quartz (SiO2)) — sedimentary

Oolitic Chert

Ooidal Microcrystalline Quartz (SiO2)

Yellow Jasper (Silicon Dioxide (SiO2) with goethite or limonite inclusions) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with goethite or limonite inclusions

Chert Fossil (Pebble) (Microcrystalline Quartz (SiO2) with biogenic inclusions) — sedimentary

Chert Fossil (Pebble)

Microcrystalline Quartz (SiO2) with biogenic inclusions

Petrified Wood (Silicified Wood (primarily SiO₂ - Silicon Dioxide)) — metamorphic

Petrified Wood

Silicified Wood (primarily SiO₂ - Silicon Dioxide)

Hematite (Hematite (Fe2O3)) — Mineral

Hematite

Hematite (Fe2O3)

Mixed rock and mineral specimen collection (Multiple species, likely quartz (SiO₂), calcite (CaCO₃), feldspar, chert, and assorted volcanic/sedimentary rocks) — mineral

Mixed rock and mineral specimen collection

Multiple species, likely quartz (SiO₂), calcite (CaCO₃), feldspar, chert, and assorted volcanic/sedimentary rocks

Tumbled green aventurine (likely) (Quartz, SiO₂, containing green fuchsite mica or other inclusions) — mineral

Tumbled green aventurine (likely)

Quartz, SiO₂, containing green fuchsite mica or other inclusions

White Quartz (Tumbled/Waterworn) (Silicon Dioxide (SiO2)) — mineral

White Quartz (Tumbled/Waterworn)

Silicon Dioxide (SiO2)

Quartz (Microcrystalline/Agate) (Silicon Dioxide (SiO2)) — mineral

Quartz (Microcrystalline/Agate)

Silicon Dioxide (SiO2)

Sandstone (lithic wacke) (Arenite / Lithic Wacke (mostly SiO2 with rock fragments)) — sedimentary

Sandstone (lithic wacke)

Arenite / Lithic Wacke (mostly SiO2 with rock fragments)

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

Quartz (Milky or Cloudy variety)

Silicon Dioxide (SiO2)

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

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Sandstone (likely Quartzose type) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (likely Quartzose type)

Clastic sedimentary rock (primarily SiO2)

Granite Pebble (Granite (composed primarily of Quartz, Feldspar, and Mica/Amphibole)) — igneous

Granite Pebble

Granite (composed primarily of Quartz, Feldspar, and Mica/Amphibole)

Quartzite (with Metamorphic Foliation) (Quartzite (Recrystallized SiO2)) — metamorphic

Quartzite (with Metamorphic Foliation)

Quartzite (Recrystallized SiO2)

Yellow Quartz (Citrine/Gold Quartz) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine/Gold Quartz)

Silicon Dioxide (SiO2)

Milky Quartz with Iron Inclusions (Crystalline Silicon Dioxide (SiO2)) — mineral

Milky Quartz with Iron Inclusions

Crystalline Silicon Dioxide (SiO2)

Quartz (Citrine or Smoky variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Citrine or Smoky variety)

Silicon Dioxide (SiO2)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Quartz with Mica Schist (Pegmatite Specimen) (SiO2 (Silicon Dioxide) and Phyllosilicates (Biotite/Muscovite)) — Igneous/Metamorphic Hybrid

Quartz with Mica Schist (Pegmatite Specimen)

SiO2 (Silicon Dioxide) and Phyllosilicates (Biotite/Muscovite)

Igneous/Metamorphic Hybrid

Petrified Wood (Silicified Wood) (Silicified Wood / Silicon Dioxide (SiO2)) — metamorphic

Petrified Wood (Silicified Wood)

Silicified Wood / Silicon Dioxide (SiO2)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Red Quartzite (Quartzite (Metamorphosed Quartz Arenite)) — metamorphic

Red Quartzite

Quartzite (Metamorphosed Quartz Arenite)

Quartz in Basalt (Xenocryst) (Silicon Dioxide (SiO2) in Mafic Igneous Volcanic Rock) — Igneous

Quartz in Basalt (Xenocryst)

Silicon Dioxide (SiO2) in Mafic Igneous Volcanic Rock

Red Jasper (Microcrystalline Quartz (Chalcedony), SiO2) — sedimentary

Red Jasper

Microcrystalline Quartz (Chalcedony), SiO2

Quartz Crystal Cluster (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal Cluster

Silicon Dioxide (SiO2)

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

Banded Chalcedony (Agate)

Cryptocrystalline Quartz (SiO2)

Beaded Jewelry (Assorted Gemstones) (Various minerals, including but not limited to Quartz (SiO2), Garnet (X3Y2(SiO4)3), Jade (Na(Al,Fe)Si2O6), Amethyst (SiO2),等の多様な組み合わせ) — Mineral, Jewelry

Beaded Jewelry (Assorted Gemstones)

Various minerals, including but not limited to Quartz (SiO2), Garnet (X3Y2(SiO4)3), Jade (Na(Al,Fe)Si2O6), Amethyst (SiO2),等の多様な組み合わせ

Mineral, Jewelry

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Red Jasper (Banded Jasper) (Silicon Dioxide (SiO2) with Hematite impurities) — sedimentary

Red Jasper (Banded Jasper)

Silicon Dioxide (SiO2) with Hematite impurities

Gossan (Iron Hat) (Limonitic Gossan (Fe2O3·nH2O)) — sedimentary

Gossan (Iron Hat)

Limonitic Gossan (Fe2O3·nH2O)

Chert (with Quartz vein) (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert (with Quartz vein)

Chert (Silicon Dioxide, SiO2)