Rock Identifier

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Browse this image does not display a rock, mineral, or geological specimen. it shows a human hand wearing a ring. specimens identified by the Rock Identifier community.

Yellow Jasper (Silicon Dioxide (SiO2) with iron hydroxides) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides

Jasper (Silicon dioxide (SiO2) with impurities) — sedimentary

Jasper

Silicon dioxide (SiO2) with impurities

Carnelian (Carnelian (variety of Chalcedony, SiO2)) — mineral

Carnelian

Carnelian (variety of Chalcedony, SiO2)

Sandstone (likely Siltstone variety) (Arenite / Siltstone (primary mineral SiO2)) — sedimentary

Sandstone (likely Siltstone variety)

Arenite / Siltstone (primary mineral SiO2)

Green Schist (Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)) — metamorphic

Green Schist

Greenschist (composed primarily of Chlorite, Actinolite, and Epidote)

Carnelian (Carnelian Chalcedony (SiO2 with iron oxide impurities)) — mineral

Carnelian

Carnelian Chalcedony (SiO2 with iron oxide impurities)

Quartzite (River-worn Shiner) (Quartzite (Formula: SiO2)) — metamorphic

Quartzite (River-worn Shiner)

Quartzite (Formula: SiO2)

Petrified Wood (Silicified wood (primarily Silicon Dioxide - SiO2)) — mineral (silicate-replaced organic material)

Petrified Wood

Silicified wood (primarily Silicon Dioxide - SiO2)

mineral (silicate-replaced organic material)

Jasper with Quartz Veining (Silicon Dioxide (SiO2) - Cryptocrystalline Chalcedony) — sedimentary

Jasper with Quartz Veining

Silicon Dioxide (SiO2) - Cryptocrystalline Chalcedony

Amethyst (variety of Quartz) (SiO2 (Silicon Dioxide) with trace iron impurities) — Mineral

Amethyst (variety of Quartz)

SiO2 (Silicon Dioxide) with trace iron impurities

Limonite (Ironstone Concretion) (Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)) — mineral

Limonite (Ironstone Concretion)

Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)

Limonite with Hematite (Limonite (FeO(OH)·nH2O) and Hematite (Fe2O3)) — mineral

Limonite with Hematite

Limonite (FeO(OH)·nH2O) and Hematite (Fe2O3)

Amethyst (Silicon Dioxide (SiO2) with trivalent iron (Fe3+) impurities) — mineral

Amethyst

Silicon Dioxide (SiO2) with trivalent iron (Fe3+) impurities

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

Magnetite (likely in Hematite or Ironstone)

Magnetite (Fe3O4)

Rose Quartz (Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese) — mineral

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

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

Amethyst Geode

Silicon Dioxide (SiO2) with iron impurities

Chert (often called Flint or River Pebble) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint or River Pebble)

Microcrystalline Quartz (SiO2)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Chert (River Pebble) (Chert (Microcrystalline Quartz, SiO2)) — sedimentary

Chert (River Pebble)

Chert (Microcrystalline Quartz, SiO2)

Nephrite Jade (Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)) — metamorphic

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Yellow Jasper (Silicon Dioxide (SiO2) with iron hydroxides (Goethite)) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides (Goethite)

Standing Liberty Quarter (Silver Specimen) (Native Silver alloy (Ag with Cu traces)) — mineral

Standing Liberty Quarter (Silver Specimen)

Native Silver alloy (Ag with Cu traces)

Pink Quartzite (Quartzite (primarily SiO2)) — metamorphic

Pink Quartzite

Quartzite (primarily SiO2)

Chert (Beach Pebble) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Beach Pebble)

Silicon Dioxide (SiO2)

Blue Goldstone (Aventurine Glass) — Man-made mineral simulant (Glass)

Blue Goldstone

Aventurine Glass

Man-made mineral simulant (Glass)

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Yellow Quartzite Pebble (Quartzite (SiO2 with Iron Oxide staining)) — metamorphic

Yellow Quartzite Pebble

Quartzite (SiO2 with Iron Oxide staining)

Yellow Chert or Jasper (Microcrystalline Quartz (SiO2) with iron oxide inclusions) — sedimentary

Yellow Chert or Jasper

Microcrystalline Quartz (SiO2) with iron oxide inclusions

Epidote-bearing Granite (Unakite-like) (Epidotized Granite) — igneous

Epidote-bearing Granite (Unakite-like)

Epidotized Granite

Lapis Lazuli (Na6Ca2(Al6Si6O24)(SO4,S,Cl,OH)2 (Lazurite-dominated rock)) — metamorphic

Lapis Lazuli

Na6Ca2(Al6Si6O24)(SO4,S,Cl,OH)2 (Lazurite-dominated rock)

Labradorite (Labradorite ((Ca, Na)(Al, Si)4O8)) — mineral

Labradorite

Labradorite ((Ca, Na)(Al, Si)4O8)

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

Fluorite

Fluorite (Calcium Fluoride, CaF2)

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

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Crystal Quartz Beads (likely Clear Quartz) (Quartz (SiO₂)) — Mineral

Crystal Quartz Beads (likely Clear Quartz)

Quartz (SiO₂)

Citrine (Quartz (SiO2) - variety Citrine) — Mineral

Citrine

Quartz (SiO2) - variety Citrine

Tiger's Eye (Titanium-containing Quartz (Silica: SiO2)) — Mineral

Tiger's Eye

Titanium-containing Quartz (Silica: SiO2)

Chert (often called Flint when dark) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint when dark)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Specular Hematite (Specularite) (Iron Oxide (Fe2O3)) — mineral

Specular Hematite (Specularite)

Iron Oxide (Fe2O3)

Magnetite (potentially Hematite-rich) (Magnetite (Fe3O4)) — mineral

Magnetite (potentially Hematite-rich)

Magnetite (Fe3O4)

Chert (Quartz Pebble) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Quartz Pebble)

Silicon Dioxide (SiO2)

Citrine (Silicon dioxide (SiO2)) — mineral

Citrine

Silicon dioxide (SiO2)