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

Polished blue sodalite cabochons (Sodalite, Na₈Al₆Si₆O₂₄Cl₂) — mineral

Polished blue sodalite cabochons

Sodalite, Na₈Al₆Si₆O₂₄Cl₂

Granite Gravel / Crushed Granite (Plutonic Felsic Igneous Rock) — igneous

Granite Gravel / Crushed Granite

Plutonic Felsic Igneous Rock

Granite River Cobble (Phaneritic Felsic Igneous Rock (Granite)) — igneous

Granite River Cobble

Phaneritic Felsic Igneous Rock (Granite)

Granite Cobble (Plutonic Igneous Rock (Granitic)) — igneous

Granite Cobble

Plutonic Igneous Rock (Granitic)

Brown chalcedony (likely carnelian/agate) (Cryptocrystalline quartz, SiO₂; iron-bearing chalcedony) — mineral

Brown chalcedony (likely carnelian/agate)

Cryptocrystalline quartz, SiO₂; iron-bearing chalcedony

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

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Quartz (Milky Quartz) (Quartz (SiO2 - Silicon Dioxide)) — Mineral

Quartz (Milky Quartz)

Quartz (SiO2 - Silicon Dioxide)

Chert (or Flint) (Chert (cryptocrystalline quartz), SiO2) — Sedimentary

Chert (or Flint)

Chert (cryptocrystalline quartz), SiO2

Diamond (Carbon (C)) — gemstone

Diamond

Carbon (C)

Cinnabar in Quartz (Silicon Dioxide (SiO2) with Mercury Sulfide (HgS) inclusions) — Mineral

Cinnabar in Quartz

Silicon Dioxide (SiO2) with Mercury Sulfide (HgS) inclusions

Weathered fossiliferous limestone (Bioclastic limestone, chiefly calcite (CaCO₃)) — sedimentary

Weathered fossiliferous limestone

Bioclastic limestone, chiefly calcite (CaCO₃)

Basalt (Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase and pyroxene, commonly with olivine) — igneous

Basalt

Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase and pyroxene, commonly with olivine

Worked chert (likely flint) (Microcrystalline quartz/chalcedony, SiO₂) — sedimentary

Worked chert (likely flint)

Microcrystalline quartz/chalcedony, SiO₂

Porphyritic rhyolite (likely lithophysal/vesicular rhyolite) (Rhyolite; chiefly quartz and alkali feldspar, with minor plagioclase and iron-bearing minerals) — igneous

Porphyritic rhyolite (likely lithophysal/vesicular rhyolite)

Rhyolite; chiefly quartz and alkali feldspar, with minor plagioclase and iron-bearing minerals

Chert (Flint) (Chert (Cryptocrystalline silicon dioxide, SiO2)) — sedimentary

Chert (Flint)

Chert (Cryptocrystalline silicon dioxide, SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Coal (Combustible sedimentary rock) — sedimentary

Coal

Combustible sedimentary rock

Quartzite (Quartzite) — Metamorphic rock

Quartzite

Quartzite

Metamorphic rock

Quartz-rich pegmatite with green mica or chlorite (Granitic pegmatite; chiefly quartz (SiO₂), with feldspar and probable muscovite/chlorite) — igneous

Quartz-rich pegmatite with green mica or chlorite

Granitic pegmatite; chiefly quartz (SiO₂), with feldspar and probable muscovite/chlorite

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

Cubic Zirconia (or possibly Diamond) (Zirconium dioxide (or Carbon)) — gemstone

Cubic Zirconia (or possibly Diamond)

Zirconium dioxide (or Carbon)

Likely weathered quartz-rich rock fragment (Uncertain; possibly granitic pegmatite or quartz-bearing metamorphic rock) — igneous

Likely weathered quartz-rich rock fragment

Uncertain; possibly granitic pegmatite or quartz-bearing metamorphic rock

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Slate (Metamorphic Rock (Fine-grained)) — metamorphic

Slate

Metamorphic Rock (Fine-grained)

Gray Granite (Phaneritic plutonic rock (Granite)) — igneous

Gray Granite

Phaneritic plutonic rock (Granite)

Yellow chalcedony (likely lemon quartz or citrine) (Cryptocrystalline silica, SiO₂; possible quartz variety) — mineral

Yellow chalcedony (likely lemon quartz or citrine)

Cryptocrystalline silica, SiO₂; possible quartz variety

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Rhinestone (or glass crystal) (Silicon dioxide (if glass) / Various) — Mineral/gemstone imitation

Rhinestone (or glass crystal)

Silicon dioxide (if glass) / Various

Mineral/gemstone imitation

Quartz (Quartz (SiO₂)) — Mineral

Quartz

Quartz (SiO₂)

Basalt with Mineral Vein (Cobble) (Basalt (with likely Quartz/Calcite vein)) — Igneous

Basalt with Mineral Vein (Cobble)

Basalt (with likely Quartz/Calcite vein)

Vesicular basalt (possibly amygdaloidal basalt) (Basalt, chiefly plagioclase feldspar and pyroxene, with possible olivine and secondary mineral infillings) — igneous

Vesicular basalt (possibly amygdaloidal basalt)

Basalt, chiefly plagioclase feldspar and pyroxene, with possible olivine and secondary mineral infillings

Red-and-cream jasper (Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides) — mineral

Red-and-cream jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

Quartz–mica metamorphic rock, likely schist (Quartz–muscovite/biotite schist; predominantly SiO₂ quartz with phyllosilicate micas) — metamorphic

Quartz–mica metamorphic rock, likely schist

Quartz–muscovite/biotite schist; predominantly SiO₂ quartz with phyllosilicate micas

Weathered granite or granitic gneiss fragment (Coarse quartz–feldspar–mica aggregate; possibly weakly foliated gneiss) — igneous

Weathered granite or granitic gneiss fragment

Coarse quartz–feldspar–mica aggregate; possibly weakly foliated gneiss

Chert / Flint (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert / Flint

Cryptocrystalline Quartz (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert (often referred to as Flint or Jasper when pigmented) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often referred to as Flint or Jasper when pigmented)

Microcrystalline or cryptocrystalline Quartz (SiO2)

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

Chert (Flint Nodules)

Microcrystalline Quartz (SiO2)

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

Chert (Flint)

Chert (SiO2)

Lazulite (Lazulite (Mg,Fe2+)Al2(PO4)2(OH)2) — mineral

Lazulite

Lazulite (Mg,Fe2+)Al2(PO4)2(OH)2

Pink quartz-rich stone, likely rose quartz (Rose quartz; quartz, SiO₂, commonly colored by trace elements and microscopic inclusions) — mineral

Pink quartz-rich stone, likely rose quartz

Rose quartz; quartz, SiO₂, commonly colored by trace elements and microscopic inclusions

Weathered vesicular stone, possibly pumice or scoria (Vesicular volcanic rock; likely pumice (highly vesicular rhyolitic material) or scoria (basaltic material)) — igneous

Weathered vesicular stone, possibly pumice or scoria

Vesicular volcanic rock; likely pumice (highly vesicular rhyolitic material) or scoria (basaltic material)