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

Serpentine / Serpentinite (with Weathering Crust) (Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4) — metamorphic

Serpentine / Serpentinite (with Weathering Crust)

Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4

Red Jasper (Microcrystalline Quartz (SiO2 with Iron Oxide impurities)) — sedimentary

Red Jasper

Microcrystalline Quartz (SiO2 with Iron Oxide impurities)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Serpentinite (often called Jade or Nephrite substitute) (Serpentinite (composed primarily of Antigorite, Lizardite, or Chrysotile)) — metamorphic

Serpentinite (often called Jade or Nephrite substitute)

Serpentinite (composed primarily of Antigorite, Lizardite, or Chrysotile)

Serpentine (Antigorite, Lizardite, or Chrysotile; Mg3Si2O5(OH)4) — metamorphic

Serpentine

Antigorite, Lizardite, or Chrysotile; Mg3Si2O5(OH)4

Olivine ((Mg,Fe)2SiO4 (Magnesium Iron Silicate)) — mineral

Olivine

(Mg,Fe)2SiO4 (Magnesium Iron Silicate)

Serpentinite (Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4) — metamorphic

Serpentinite

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)2-3(Si, Al, Fe)2O5(OH)4

Rose Quartz (Silicon Dioxide (SiO2)) — mineral

Rose Quartz

Silicon Dioxide (SiO2)

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

Jasper

Silicon Dioxide (SiO2) with impurities

Limonite (FeO(OH)·nH2O (Hydrated iron oxide)) — mineral

Limonite

FeO(OH)·nH2O (Hydrated iron oxide)

Polished brown mineral fragment, likely quartz-rich iron-stained material (Possibly quartz (SiO₂) with iron-oxide inclusions; exact identification is uncertain from the image) — mineral

Polished brown mineral fragment, likely quartz-rich iron-stained material

Possibly quartz (SiO₂) with iron-oxide inclusions; exact identification is uncertain from the image

Petrified Wood (Silicified Wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

Chert (variations include Flint or Jasper) (Chert (SiO2)) — sedimentary

Chert (variations include Flint or Jasper)

Chert (SiO2)

Black tumbled stone, likely basalt or black jasper (Most consistent with fine-grained basalt (mainly plagioclase and pyroxene); exact identification requires testing) — igneous

Black tumbled stone, likely basalt or black jasper

Most consistent with fine-grained basalt (mainly plagioclase and pyroxene); exact identification requires testing

Rhodochrosite with Quartz (Manganese Carbonate (MnCO3) with Silicon Dioxide (SiO2)) — mineral

Rhodochrosite with Quartz

Manganese Carbonate (MnCO3) with Silicon Dioxide (SiO2)

Rough Diamond (Carbon (C)) — gemstone

Rough Diamond

Carbon (C)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Serpentine (Serpentinite) (Serpentinite (complex silicate group including lizardite, chrysotile, and antigorite)) — metamorphic

Serpentine (Serpentinite)

Serpentinite (complex silicate group including lizardite, chrysotile, and antigorite)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Coquina / Limonite-stained Limestone (Sedimentary Limestone with Iron Oxyhydroxide (FeO(OH)·nH2O)) — sedimentary

Coquina / Limonite-stained Limestone

Sedimentary Limestone with Iron Oxyhydroxide (FeO(OH)·nH2O)

Flint (Microcrystalline quartz (SiO2)) — sedimentary

Flint

Microcrystalline quartz (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Granite (Intrusive Igneous Rock (composed primarily of quartz, alkali feldspar, and plagioclase)) — igneous

Granite

Intrusive Igneous Rock (composed primarily of quartz, alkali feldspar, and plagioclase)

Granite fragment (Granite) — igneous

Granite fragment

Granite

Weathered basalt or iron-rich volcanic rock (Mafic volcanic rock, likely basalt; exact identification requires testing) — igneous

Weathered basalt or iron-rich volcanic rock

Mafic volcanic rock, likely basalt; exact identification requires testing

Malachite (Malachite — Cu₂CO₃(OH)₂, hydrated copper carbonate) — mineral

Malachite

Malachite — Cu₂CO₃(OH)₂, hydrated copper carbonate

Red Sandstone (Clastic Terrigenous Sedimentary Rock (typically Hematitic Quartz Arenite or Arkose)) — sedimentary

Red Sandstone

Clastic Terrigenous Sedimentary Rock (typically Hematitic Quartz Arenite or Arkose)

Peridot (Olivine) (Magnesium Iron Silicate (Mg,Fe)2SiO4) — gemstone

Peridot (Olivine)

Magnesium Iron Silicate (Mg,Fe)2SiO4

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

Chert / Flint

Silicon Dioxide (SiO2)

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

Porphyry (Porphyritic Igneous Rock) — igneous

Porphyry

Porphyritic Igneous Rock

Green Fluorite (Calcium Fluoride (CaF2)) — mineral

Green Fluorite

Calcium Fluoride (CaF2)

Conglomerate (Conglomerate (Sedimentary Clastic Rock)) — sedimentary

Conglomerate

Conglomerate (Sedimentary Clastic Rock)

Petrified Wood (Silicified wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified wood (primarily SiO2)

Chert (Jasper) Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper) Pebble

Microcrystalline Quartz (SiO2)

Diamond (or Cubic Zirconia) (Carbon (C) or Zirconium Dioxide (ZrO2)) — gemstone

Diamond (or Cubic Zirconia)

Carbon (C) or Zirconium Dioxide (ZrO2)

Peridot (Olivine) (Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)) — mineral

Peridot (Olivine)

Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)

Amethyst (likely rough or cleaved fragment) (Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron impurities and irradiation) — mineral

Amethyst (likely rough or cleaved fragment)

Quartz, silicon dioxide (SiO₂), purple variety colored mainly by iron impurities and irradiation

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

Chert / Flint

Cryptocrystalline Quartz (SiO2)

Polished pale stone, likely limestone or quartzite pebble (Most consistent with micritic limestone (calcite, CaCO₃), though the image cannot confirm mineralogy) — sedimentary

Polished pale stone, likely limestone or quartzite pebble

Most consistent with micritic limestone (calcite, CaCO₃), though the image cannot confirm mineralogy

Weathered iron-rich sandstone or laterite (Ferruginous sandstone; potentially lateritic ironstone, composed mainly of quartz (SiO₂) with iron oxides/hydroxides) — sedimentary

Weathered iron-rich sandstone or laterite

Ferruginous sandstone; potentially lateritic ironstone, composed mainly of quartz (SiO₂) with iron oxides/hydroxides

Possible dark igneous rock (Indeterminate; likely basalt or fine-grained mafic rock) — igneous

Possible dark igneous rock

Indeterminate; likely basalt or fine-grained mafic rock