Rock Identifier

Community gallery

All rocks & minerals

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

Turquoise (Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O) — mineral

Turquoise

Hydrated phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O

mineral
Obsidian (Volcanic Glass (SiO2)) — igneous

Obsidian

Volcanic Glass (SiO2)

igneous
Dyed Blue Agate (Dragon Vein Agate) (Silicon Dioxide (SiO2) with artificial cobalt/organic dyes) — mineral

Dyed Blue Agate (Dragon Vein Agate)

Silicon Dioxide (SiO2) with artificial cobalt/organic dyes

mineral
Boulder Opal (Hydrated Silica (SiO2·nH2O)) — mineraloid

Boulder Opal

Hydrated Silica (SiO2·nH2O)

mineraloid
Granodiorite (Phaneritic intrusive igneous rock (intermediate composition)) — igneous

Granodiorite

Phaneritic intrusive igneous rock (intermediate composition)

igneous
Scoria (Scoriaceous Basalt) — igneous

Scoria

Scoriaceous Basalt

igneous
Basalt (Basalt) — igneous

Basalt

Basalt

igneous
Limonite (Iron Ore) (Hydrous ferric oxides (FeO(OH)·nH2O)) — sedimentary

Limonite (Iron Ore)

Hydrous ferric oxides (FeO(OH)·nH2O)

sedimentary
Basalt River Cobble (Basalt (Mafic Igneous Rock)) — igneous

Basalt River Cobble

Basalt (Mafic Igneous Rock)

igneous
Glauconitic Sandstone (Glauconitic sandstone ((K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)) — sedimentary

Glauconitic Sandstone

Glauconitic sandstone ((K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2)

sedimentary
Chert (var. Jasper) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (var. Jasper)

Microcrystalline Quartz (SiO2)

sedimentary
Green Aventurine (SiO2 (Quartz with Fuchsite inclusions)) — mineral

Green Aventurine

SiO2 (Quartz with Fuchsite inclusions)

mineral
Quartz on Limestone (Silicon Dioxide (SiO2) on Calcium Carbonate (CaCO3)) — Mineral on Sedimentary

Quartz on Limestone

Silicon Dioxide (SiO2) on Calcium Carbonate (CaCO3)

Mineral on Sedimentary
Bituminous Coal (Organic Sedimentary Rock (Carbon-based)) — sedimentary

Bituminous Coal

Organic Sedimentary Rock (Carbon-based)

sedimentary
Basalt River Stone (Aphanitic Basalt) — igneous

Basalt River Stone

Aphanitic Basalt

igneous
Chert (Iron-stained) (Chert (SiO2)) — sedimentary

Chert (Iron-stained)

Chert (SiO2)

sedimentary
Yellow Jasper (Silicon Dioxide (SiO2) with iron oxide impurities) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron oxide impurities

sedimentary
Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

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

Milky Quartz

Silicon Dioxide (SiO2)

mineral
Fire Agate (Silicon Dioxide (SiO2) with layers of Limonite/Goethite) — mineral

Fire Agate

Silicon Dioxide (SiO2) with layers of Limonite/Goethite

mineral
Red Jasper (Silicon Dioxide (SiO2)) — sedimentary

Red Jasper

Silicon Dioxide (SiO2)

sedimentary
Quartzite pebble (Quartzite (SiO2 based)) — metamorphic

Quartzite pebble

Quartzite (SiO2 based)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

mineral
Hag Stone (Porous Quartz or Chert Pebble (SiO2)) — sedimentary

Hag Stone

Porous Quartz or Chert Pebble (SiO2)

sedimentary
Eudialyte (Na15Ca6Fe3Zr3Si26O72(OH,Cl)2 (Eudialyte Group)) — mineral

Eudialyte

Na15Ca6Fe3Zr3Si26O72(OH,Cl)2 (Eudialyte Group)

mineral
Chert (Smooth River Pebble) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Smooth River Pebble)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

sedimentary
Tiger's Eye (SiO2 (Silicon Dioxide) with fibrous crocidolite inclusions) — mineral

Tiger's Eye

SiO2 (Silicon Dioxide) with fibrous crocidolite inclusions

mineral
Leopard Skin Jasper (Silicon Dioxide (SiO2) with impurities) — sedimentary

Leopard Skin Jasper

Silicon Dioxide (SiO2) with impurities

sedimentary
Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

mineral
Black Onyx (Silicon Dioxide (SiO2)) — mineral

Black Onyx

Silicon Dioxide (SiO2)

mineral
Quartzite Pebble (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Metamorphic Quartzite (SiO2)

metamorphic
Fossilized Oyster Shell (Limestone/Coquina) (Crassostrea (Fossilized Bivalve), Calcium Carbonate (CaCO3)) — sedimentary

Fossilized Oyster Shell (Limestone/Coquina)

Crassostrea (Fossilized Bivalve), Calcium Carbonate (CaCO3)

sedimentary
Chert (v. Flint) (Chert (Microcrystalline Quartz, SiO2)) — sedimentary

Chert (v. Flint)

Chert (Microcrystalline Quartz, SiO2)

sedimentary
Chert (Chert (SiO2)) — sedimentary

Chert

Chert (SiO2)

sedimentary
Ruby in Quartz with Tourmaline (Corundum (Al2O3) in Silicon Dioxide (SiO2) with Schorl) — metamorphic

Ruby in Quartz with Tourmaline

Corundum (Al2O3) in Silicon Dioxide (SiO2) with Schorl

metamorphic
Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

metamorphic
Banded Agate (Silk Agate or Maligano Jasper variant) (Silicon Dioxide (SiO2)) — sedimentary

Banded Agate (Silk Agate or Maligano Jasper variant)

Silicon Dioxide (SiO2)

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

Carnelian

Carnelian (variety of Chalcedony, SiO2)

mineral
Amber (Succinate (Succinite for Baltic varieties)) — mineraloid

Amber

Succinate (Succinite for Baltic varieties)

mineraloid
Amber (Succinates (C10H16O)) — mineraloid

Amber

Succinates (C10H16O)

mineraloid
Carnelian (Agate) (Silicon Dioxide (SiO2)) — mineral

Carnelian (Agate)

Silicon Dioxide (SiO2)

mineral
Chert (Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline Quartz (SiO2)

sedimentary