Rock Identifier

Category

Man Made Material

Browse man made material specimens identified by the Rock Identifier community.

Learn about Man Made Material in the encyclopedia

Opalite

Goldstone

Blue Goldstone

Dunite

Zincite

Mint Obsidian

Crimson Obsidian

Lherzolite

Violet Obsidian

Tangerine Obsidian

Pastel Obsidian

Lilac Obsidian

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Vesicular basalt (probable) (Basalt, mainly plagioclase feldspar and pyroxene, with possible olivine and iron oxides) — igneous

Vesicular basalt (probable)

Basalt, mainly plagioclase feldspar and pyroxene, with possible olivine and iron oxides

Rounded gray stone, likely quartz-rich granitic rock (Probable granite or granitic gneiss; mainly quartz, feldspar, and mica) — igneous

Rounded gray stone, likely quartz-rich granitic rock

Probable granite or granitic gneiss; mainly quartz, feldspar, and mica

Diamond (C) — gemstone

Diamond

C

Nephrite Jade (Nephrite) — Mineral/Rock

Nephrite Jade

Nephrite

Coarse-grained Granite or Gneiss (Granitic intrusive rock) — igneous

Coarse-grained Granite or Gneiss

Granitic intrusive rock

Granite (Granite (Feldspar-Quartz-Mica Intrusive)) — igneous

Granite

Granite (Feldspar-Quartz-Mica Intrusive)

Chert (or potentially massive Quartz/Quartzite) (SiO2 (Silicon Dioxide)) — sedimentary (if chert) / metamorphic (if quartzite)

Chert (or potentially massive Quartz/Quartzite)

SiO2 (Silicon Dioxide)

sedimentary (if chert) / metamorphic (if quartzite)

Limestone with Calcite Veins (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone with Calcite Veins

Sedimentary Calcium Carbonate (CaCO3)

Granite Pebble (Felsic Igneous Rock (Granitic composition)) — igneous

Granite Pebble

Felsic Igneous Rock (Granitic composition)

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

Diamond (Faceted)

Carbon (C)

Blue-green copper mineral specimen, likely chrysocolla or turquoise (Probable chrysocolla, hydrated copper phyllosilicate (Cu₂H₂Si₂O₅(OH)₄·nH₂O); turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O, is an alternative) — mineral

Blue-green copper mineral specimen, likely chrysocolla or turquoise

Probable chrysocolla, hydrated copper phyllosilicate (Cu₂H₂Si₂O₅(OH)₄·nH₂O); turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O, is an alternative

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Amygdaloidal basalt (vesicular basalt) (Basalt, commonly containing amygdales of quartz, chalcedony, calcite, or zeolites) — igneous

Amygdaloidal basalt (vesicular basalt)

Basalt, commonly containing amygdales of quartz, chalcedony, calcite, or zeolites

Weathered sandstone cobble (Quartz-rich sandstone, primarily SiO₂ with clay/iron-oxide cement) — sedimentary

Weathered sandstone cobble

Quartz-rich sandstone, primarily SiO₂ with clay/iron-oxide cement

Tumbled blue chalcedony or pale aquamarine-like quartz (Chalcedony (microcrystalline SiO₂), possibly blue quartz; visual identification is uncertain) — mineral

Tumbled blue chalcedony or pale aquamarine-like quartz

Chalcedony (microcrystalline SiO₂), possibly blue quartz; visual identification is uncertain

Emerald (Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)) — mineral

Emerald

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Quartzite River Pebble (Quartzite (SiO2)) — metamorphic

Quartzite River Pebble

Quartzite (SiO2)

Slag Glass (Silicon dioxide with impurities) — mineral

Slag Glass

Silicon dioxide with impurities

Possible weathered quartz-rich rock or iron-stained mineral fragment (Indeterminate; possibly quartz (SiO₂) with iron-oxide inclusions) — mineral

Possible weathered quartz-rich rock or iron-stained mineral fragment

Indeterminate; possibly quartz (SiO₂) with iron-oxide inclusions

Diamond (C (Carbon)) — gemstone

Diamond

C (Carbon)

Planet Earth (Gaia (Silicate Terrestrial Planet)) — metamorphic

Planet Earth

Gaia (Silicate Terrestrial Planet)

Quartz geode (Microcrystalline and crystalline quartz (SiO₂), likely chalcedony-lined geode) — mineral

Quartz geode

Microcrystalline and crystalline quartz (SiO₂), likely chalcedony-lined geode

Quartz-rich feldspathic rock, likely granite or granitic gneiss (Granite/granitic gneiss; chiefly quartz (SiO₂), feldspar, and minor mica) — igneous

Quartz-rich feldspathic rock, likely granite or granitic gneiss

Granite/granitic gneiss; chiefly quartz (SiO₂), feldspar, and minor mica

Prase Quartz on Feldspar (Quartz (Silicon Dioxide, SiO2) with Hedenbergite inclusions on Potassium Feldspar (KAlSi3O8)) — mineral

Prase Quartz on Feldspar

Quartz (Silicon Dioxide, SiO2) with Hedenbergite inclusions on Potassium Feldspar (KAlSi3O8)

Polished rhyolite (likely porphyritic rhyolite) (Rhyolite, composed chiefly of quartz and alkali feldspar with minor plagioclase, biotite, and iron oxides) — igneous

Polished rhyolite (likely porphyritic rhyolite)

Rhyolite, composed chiefly of quartz and alkali feldspar with minor plagioclase, biotite, and iron oxides

Tumbled blue-green stone, likely aquamarine-bearing pegmatite or blue apatite (Probable fluorapatite, Ca5(PO4)3(F,Cl,OH), though visual identification is uncertain) — mineral

Tumbled blue-green stone, likely aquamarine-bearing pegmatite or blue apatite

Probable fluorapatite, Ca5(PO4)3(F,Cl,OH), though visual identification is uncertain

Tumbled serpentine (likely) (Serpentine-group minerals, commonly lizardite or antigorite; approximate composition Mg₃Si₂O₅(OH)₄) — mineral

Tumbled serpentine (likely)

Serpentine-group minerals, commonly lizardite or antigorite; approximate composition Mg₃Si₂O₅(OH)₄

Weathered volcanic rock, likely andesite or basalt (Fine-grained mafic to intermediate volcanic rock; probable andesite–basalt, compositionally dominated by plagioclase with pyroxene and possibly alteration minerals) — igneous

Weathered volcanic rock, likely andesite or basalt

Fine-grained mafic to intermediate volcanic rock; probable andesite–basalt, compositionally dominated by plagioclase with pyroxene and possibly alteration minerals

Tumbled carnelian/chalcedony (Cryptocrystalline quartz, SiO₂ (iron-bearing chalcedony)) — mineral

Tumbled carnelian/chalcedony

Cryptocrystalline quartz, SiO₂ (iron-bearing chalcedony)

Quartz geode / iron-stained quartz vein rock (Quartz (SiO₂), likely with iron oxides and minor feldspar or host-rock minerals) — mineral

Quartz geode / iron-stained quartz vein rock

Quartz (SiO₂), likely with iron oxides and minor feldspar or host-rock minerals

Polished jasper pebble (Jasper, microcrystalline quartz (SiO₂), commonly with iron-oxide impurities) — metamorphic

Polished jasper pebble

Jasper, microcrystalline quartz (SiO₂), commonly with iron-oxide impurities

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (Flint) (Microcrystalline silica (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline silica (SiO2)

Chert (River Stone) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (River Stone)

Microcrystalline Quartz (SiO2)

Chert (Flint) (Chert (SiO2)) — sedimentary

Chert (Flint)

Chert (SiO2)

Native Silver (Silver (Ag)) — mineral

Native Silver

Silver (Ag)

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

Green Aventurine

Quartz (SiO2) with Fuchsite inclusions

Sandstone (Sedimentary Rock (Quartz arenite or arkose)) — sedimentary

Sandstone

Sedimentary Rock (Quartz arenite or arkose)

Sandstone (Sedimentary Rock (Quartz Arenite)) — sedimentary

Sandstone

Sedimentary Rock (Quartz Arenite)

Sandstone (Sedimentary Clastic Rock (Quartz-rich)) — sedimentary

Sandstone

Sedimentary Clastic Rock (Quartz-rich)