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

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)

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)

Sandstone (Ferruginous) (Sandstone (clastic sedimentary rock, mainly SiO2 with iron oxide cement)) — sedimentary

Sandstone (Ferruginous)

Sandstone (clastic sedimentary rock, mainly SiO2 with iron oxide cement)

Weathered, porous limestone (probable fossiliferous limestone) (Calcite-rich limestone; predominantly CaCO₃) — sedimentary

Weathered, porous limestone (probable fossiliferous limestone)

Calcite-rich limestone; predominantly CaCO₃

Polished orbicular granite (Granite, chiefly quartz, alkali feldspar, plagioclase, and biotite/amphibole) — igneous

Polished orbicular granite

Granite, chiefly quartz, alkali feldspar, plagioclase, and biotite/amphibole

Pegmatite with quartz, feldspar, mica, and tourmaline (Granitic pegmatite; chiefly quartz (SiO₂), feldspar, muscovite, and black schorl tourmaline (NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)) — igneous

Pegmatite with quartz, feldspar, mica, and tourmaline

Granitic pegmatite; chiefly quartz (SiO₂), feldspar, muscovite, and black schorl tourmaline (NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

Chalcedony (gray-white agate) (Microcrystalline quartz, SiO₂) — mineral

Chalcedony (gray-white agate)

Microcrystalline quartz, SiO₂

Quartz-rich metamorphic rock (likely mica schist or gneiss) (Quartz–feldspar–mica assemblage; probable biotite schist/gneiss) — metamorphic

Quartz-rich metamorphic rock (likely mica schist or gneiss)

Quartz–feldspar–mica assemblage; probable biotite schist/gneiss

Chert (Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Flint)

Silicon Dioxide (SiO2)

Chert (and Flint) (Silicon Dioxide (SiO2)) — sedimentary

Chert (and Flint)

Silicon Dioxide (SiO2)

Chert (Flint) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — sedimentary

Chert (Flint)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Calcite (commonly referred to as Orange Calcite or Honey Calcite given its color) (Calcite) — Mineral

Calcite (commonly referred to as Orange Calcite or Honey Calcite given its color)

Calcite

Fossil Coral (Rugose Coral / Hexagonaria (CaCO3)) — fossil

Fossil Coral

Rugose Coral / Hexagonaria (CaCO3)

Clear Quartz (Faceted) or Cubic Zirconia / Glass imitation (SiO2 (if Quartz), ZrO2 (if Cubic Zirconia)) — mineral

Clear Quartz (Faceted) or Cubic Zirconia / Glass imitation

SiO2 (if Quartz), ZrO2 (if Cubic Zirconia)

Vesicular basalt (possibly scoria) (Basalt; chiefly plagioclase feldspar, pyroxene, and often olivine, with volcanic glass) — igneous

Vesicular basalt (possibly scoria)

Basalt; chiefly plagioclase feldspar, pyroxene, and often olivine, with volcanic glass

Thunderegg (Agate or Quartz Geode) (Silica-filled rhyolitic nodule (SiO2)) — sedimentary

Thunderegg (Agate or Quartz Geode)

Silica-filled rhyolitic nodule (SiO2)

Granite Boulder (Felsic Intrusive Igneous Rock) — igneous

Granite Boulder

Felsic Intrusive Igneous Rock

Chert Pebble (Jasper or Agate variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Pebble (Jasper or Agate variety)

Microcrystalline Quartz (SiO2)

Granite Fragment (Felsic Plutonic Rock (Granite)) — igneous

Granite Fragment

Felsic Plutonic Rock (Granite)

Limestone Gravel (Calcium Carbonate (CaCO3)) — sedimentary

Limestone Gravel

Calcium Carbonate (CaCO3)

Diamond (in a jewelry setting) (Cubic Carbon (C)) — mineral

Diamond (in a jewelry setting)

Cubic Carbon (C)

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

Limestone with Calcite Crust

Sedimentary Calcium Carbonate (CaCO3)

Sandstone (Quartzose Sandstone) (Clastic Sedimentary Rock (Lithic arenite / Quartz arenite)) — sedimentary

Sandstone (Quartzose Sandstone)

Clastic Sedimentary Rock (Lithic arenite / Quartz arenite)

Limestone (Weathered Aggregate) (Sedimentary Carbonate Rock (CaCO3)) — sedimentary

Limestone (Weathered Aggregate)

Sedimentary Carbonate Rock (CaCO3)

Limestone Pebble (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone Pebble

Sedimentary Calcium Carbonate (CaCO3)

Green Apatite on Albite (Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]) — mineral

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Sandstone (Sedimentary Rock (Quartz arenite/Arkose)) — sedimentary

Sandstone

Sedimentary Rock (Quartz arenite/Arkose)

Sandstone (Sedimentary quartz arenite) — sedimentary

Sandstone

Sedimentary quartz arenite

Sandstone (Quartzose Sandstone) (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone (Quartzose Sandstone)

Clastic sedimentary rock (primarily SiO2)

Sandstone (Arenite (SiO2 with various cementing agents)) — sedimentary

Sandstone

Arenite (SiO2 with various cementing agents)

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

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

Flint / Chert

Microcrystalline Quartz (SiO2)

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

Diamond

Diamond (pure carbon, C)

White seed-bead gemstone strand, likely freshwater pearl or shell pearl (Pearl: nacreous calcium carbonate, chiefly aragonite (CaCO₃) in conchiolin; identification uncertain from image) — gemstone

White seed-bead gemstone strand, likely freshwater pearl or shell pearl

Pearl: nacreous calcium carbonate, chiefly aragonite (CaCO₃) in conchiolin; identification uncertain from image

Asphalt concrete (Anthropogenic conglomerate) — sedimentary

Asphalt concrete

Anthropogenic conglomerate

Olivine in Basalt (Peridotite / Forsterite ((Mg,Fe)2SiO4)) — igneous

Olivine in Basalt

Peridotite / Forsterite ((Mg,Fe)2SiO4)