Rock Identifier

Community gallery

All rocks & minerals

Every specimen the Rock Identifier community has discovered, from desert agates to deep-sea basalts.

Snowflake Obsidian (Spherulitic Obsidian (contains Cristobalite inclusions)) — igneous

Snowflake Obsidian

Spherulitic Obsidian (contains Cristobalite inclusions)

Chert (specifically Flint or Nodular Chert) (Silicon Dioxide (SiO2)) — sedimentary

Chert (specifically Flint or Nodular Chert)

Silicon Dioxide (SiO2)

Mixed Crushed Stone (Aggregate (varied mineral composition)) — igneous and sedimentary mixture

Mixed Crushed Stone

Aggregate (varied mineral composition)

igneous and sedimentary mixture

Obsidian (Obsidian (Volcanic glass), SiO2 (70% or more)) — igneous

Obsidian

Obsidian (Volcanic glass), SiO2 (70% or more)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

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

Labradorite

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

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Sunstone (Feldspar (variety Oligoclase or Labradorite), (Ca,Na)(Al,Si)4O8) — mineral

Sunstone

Feldspar (variety Oligoclase or Labradorite), (Ca,Na)(Al,Si)4O8

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Yellow Quartz or Citrine Geode/Cluster (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz or Citrine Geode/Cluster

Silicon Dioxide (SiO2)

Chalcedony on Matrix (Silicon Dioxide (SiO2)) — mineral

Chalcedony on Matrix

Silicon Dioxide (SiO2)

Greenshist / Chlorite Schist (Chlorite schist (contains (Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6)) — metamorphic

Greenshist / Chlorite Schist

Chlorite schist (contains (Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Diamond (Faceted Gemstone) (Native Carbon (C)) — mineral

Diamond (Faceted Gemstone)

Native Carbon (C)

Diamond (Diamond (C)) — mineral

Diamond

Diamond (C)

Diamond (C (Native Carbon)) — mineral

Diamond

C (Native Carbon)

Diamond (Diamond (pure carbon, C)) — mineral

Diamond

Diamond (pure carbon, C)

Cubic Zirconia (Zirconium Dioxide (ZrO2)) — mineral

Cubic Zirconia

Zirconium Dioxide (ZrO2)

Diamond (Native Carbon (C)) — mineral

Diamond

Native Carbon (C)

Natural Diamond (Faceted) (Diamond (pure carbon crystal, C)) — mineral

Natural Diamond (Faceted)

Diamond (pure carbon crystal, C)

Diamond (Faceted) (Carbon (C)) — mineral

Diamond (Faceted)

Carbon (C)

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

Pyrite (Fool's Gold) (Iron Sulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Diamond (C (Native Carbon)) — mineral

Diamond

C (Native Carbon)

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

Diamond (Carbon (C), Native Element) — mineral

Diamond

Carbon (C), Native Element

Diamond (Diamond (pure Carbon, C)) — mineral

Diamond

Diamond (pure Carbon, C)

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

Moissanite (Silicon Carbide (SiC)) — mineral

Moissanite

Silicon Carbide (SiC)

Micrometeorite (Spherule) (Extraterrestrial Accretion Spherule) — mineral

Micrometeorite (Spherule)

Extraterrestrial Accretion Spherule

Peridot (Olivine ((Mg, Fe)2SiO4)) — mineral

Peridot

Olivine ((Mg, Fe)2SiO4)

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

Diamond (Carbon (C) - Native Element) — mineral

Diamond

Carbon (C) - Native Element

Yellow Diamond (Faceted) (Diamond (pure carbon) with nitrogen impurities, C) — mineral

Yellow Diamond (Faceted)

Diamond (pure carbon) with nitrogen impurities, C

Gold Nugget (or Gold Grain) (Native Gold (Au)) — mineral

Gold Nugget (or Gold Grain)

Native Gold (Au)

Opal (Hydrated Amorphous Silica (SiO2·nH2O)) — mineral

Opal

Hydrated Amorphous Silica (SiO2·nH2O)

Diamond (Diamond (C)) — mineral

Diamond

Diamond (C)

Diamond (faceted) (Diamond (Pure Carbon, C)) — mineral

Diamond (faceted)

Diamond (Pure Carbon, C)

Diamond (Pure Carbon (C)) — mineral

Diamond

Pure Carbon (C)