Rock Identifier

Community gallery

All rocks & minerals

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

Quartz (Silicon dioxide (SiO2)) — mineral

Quartz

Silicon dioxide (SiO2)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Limestone (Sedimentary Calcite (CaCO3)) — sedimentary

Limestone

Sedimentary Calcite (CaCO3)

Iron Ore (Goethite and Hematite) (Iron Oxyhydroxide (α-FeO(OH)) and Iron(III) oxide (Fe2O3)) — sedimentary

Iron Ore (Goethite and Hematite)

Iron Oxyhydroxide (α-FeO(OH)) and Iron(III) oxide (Fe2O3)

Green Aventurine (Aventurine Quartz (SiO2 containing Fuchsite)) — metamorphic

Green Aventurine

Aventurine Quartz (SiO2 containing Fuchsite)

Green Aventurine (Silicon Dioxide (Quartz with Fuchsite inclusions) - SiO2) — metamorphic

Green Aventurine

Silicon Dioxide (Quartz with Fuchsite inclusions) - SiO2

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

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Prehnite (Prehnite (Ca2Al(AlSi3O10)(OH)2)) — mineral

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Dalmatian Jasper (Dyed Blue) (Peralkaline Rock with Arfvedsonite and Blue Dye) — igneous

Dalmatian Jasper (Dyed Blue)

Peralkaline Rock with Arfvedsonite and Blue Dye

Pumice (Pumice (Vesicular volcanic glass)) — igneous

Pumice

Pumice (Vesicular volcanic glass)

Limestone (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Vesicular Basalt (Scoria) (Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)) — igneous

Vesicular Basalt (Scoria)

Mafic Igneous Rock (primarily Plagioclase Feldspar and Pyroxene)

Turquoise in Matrix (Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)) — mineral

Turquoise in Matrix

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

Amazonite (Microcline (KAlSi3O8) with lead impurities) — mineral

Amazonite

Microcline (KAlSi3O8) with lead impurities

Fancy Jasper (Silicon Dioxide (SiO2)) — sedimentary

Fancy Jasper

Silicon Dioxide (SiO2)

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Peach Selenite (Satin Spar) (Gypsum (CaSO4·2H2O)) — mineral

Peach Selenite (Satin Spar)

Gypsum (CaSO4·2H2O)

Basalt (Basalt) — igneous

Basalt

Basalt

Ironstone Concretion (Coprolite-like) (Goethite/Hematite Siderite Spheroid (FeCO3 or FeO(OH))) — sedimentary

Ironstone Concretion (Coprolite-like)

Goethite/Hematite Siderite Spheroid (FeCO3 or FeO(OH))

Vesicular Basalt (or Scoria) (Mafic extrusive igneous rock with vesicles) — igneous

Vesicular Basalt (or Scoria)

Mafic extrusive igneous rock with vesicles

Fossiliferous Limestone (Pink/Red) (Calcium Carbonate (CaCO3) with Bioclasts) — sedimentary

Fossiliferous Limestone (Pink/Red)

Calcium Carbonate (CaCO3) with Bioclasts

Amber (Succinate (Organic Fossilized Resin)) — mineraloid

Amber

Succinate (Organic Fossilized Resin)

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Granite (Granite (Alkali-feldspar granite)) — igneous

Granite

Granite (Alkali-feldspar granite)

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

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

Red Jasper

Silicon Dioxide (SiO2) containing Iron Oxide inclusions

Arsenopyrite in Sulphide Ore (Arsenopyrite (FeAsS)) — mineral

Arsenopyrite in Sulphide Ore

Arsenopyrite (FeAsS)

Red Feldspar (Orthoclase) (Orthoclase Feldspar (KAlSi3O8)) — mineral

Red Feldspar (Orthoclase)

Orthoclase Feldspar (KAlSi3O8)

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

Red Jasper

Silicon Dioxide (SiO2) with Hematite impurities

Pyritic Mudstone (Argillaceous rock (FeS2)) — sedimentary

Pyritic Mudstone

Argillaceous rock (FeS2)

Green Slate (Greenstone) (Foliated Metamorphic Rock (rich in Chlorite/Epidote)) — metamorphic

Green Slate (Greenstone)

Foliated Metamorphic Rock (rich in Chlorite/Epidote)

Tiger's Eye (Silicified Crocidolite (Silicon Dioxide - SiO2)) — metamorphic

Tiger's Eye

Silicified Crocidolite (Silicon Dioxide - SiO2)

Glauconite (Greensand) (Glauconite (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2) — sedimentary

Glauconite (Greensand)

Glauconite (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2

Gold Ore in Quartz (Native Gold (Au) in Quartz (SiO2) matrix) — mineral

Gold Ore in Quartz

Native Gold (Au) in Quartz (SiO2) matrix

Greenstone (Greenschist (composed of chlorite, actinolite, and epidote)) — metamorphic

Greenstone

Greenschist (composed of chlorite, actinolite, and epidote)

Basalt River Pebble (Basalt) — igneous

Basalt River Pebble

Basalt

Basalt (River Pebble) (Extrusive mafic igneous rock) — igneous

Basalt (River Pebble)

Extrusive mafic igneous rock

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Amethyst (Silicon Dioxide (SiO2)) — mineral

Amethyst

Silicon Dioxide (SiO2)

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

Chert (Flint)

Chert (Microcrystalline Quartz, SiO2)

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

Apatite

Fluorapatite (Ca5(PO4)3F)