Rock Identifier

Category

Mineral Based Alloy (Anthropogenic)

Browse mineral based alloy (anthropogenic) specimens identified by the Rock Identifier community.

Learn about Mineral Based Alloy (Anthropogenic) in the encyclopedia

Sard

White Obsidian

Glauconite

Hutcheonite

Halite

Sperrylite

Baddeleyite

Anatase

Brookite

Talc

Violet Obsidian

Lavender Obsidian

Crinoid stem fossil (Crinoidea) — fossil

Crinoid stem fossil

Crinoidea

Red Sandstone (Siltstone pebble) (Arenite / Siltstone (Silicon dioxide based with hematite impurities)) — sedimentary

Red Sandstone (Siltstone pebble)

Arenite / Siltstone (Silicon dioxide based with hematite impurities)

Iron Meteorite (Oxidized) (Iron-Nickel Alloy (Fe, Ni)) — meteorite

Iron Meteorite (Oxidized)

Iron-Nickel Alloy (Fe, Ni)

Iron Meteorite (Iron-Nickel Alloy (Kamacite and Taenite)) — meteorite

Iron Meteorite

Iron-Nickel Alloy (Kamacite and Taenite)

Galena (Galena (lead sulfide, PbS)) — mineral

Galena

Galena (lead sulfide, PbS)

Copper-bearing sulfide ore, possibly bornite/chalcopyrite (Likely bornite (Cu5FeS4) and/or chalcopyrite (CuFeS2) in a sulfide-rich host rock) — mineral

Copper-bearing sulfide ore, possibly bornite/chalcopyrite

Likely bornite (Cu5FeS4) and/or chalcopyrite (CuFeS2) in a sulfide-rich host rock

Galena (likely argentiferous galena) (Galena, PbS; commonly cubic or massive lead sulfide, sometimes containing silver) — mineral

Galena (likely argentiferous galena)

Galena, PbS; commonly cubic or massive lead sulfide, sometimes containing silver

Silver-gray metallic ore, possibly galena-bearing rock (Likely galena (PbS) in a host rock, but identification is uncertain from the photograph) — mineral

Silver-gray metallic ore, possibly galena-bearing rock

Likely galena (PbS) in a host rock, but identification is uncertain from the photograph

Bismuth crystal (Bismuth (Bi), commonly laboratory-grown hopper crystal) — mineral

Bismuth crystal

Bismuth (Bi), commonly laboratory-grown hopper crystal

Sandstone (Water-worn Cobble) (Arenite (SiO2 with CaCO3 or Fe2O3 cement)) — sedimentary

Sandstone (Water-worn Cobble)

Arenite (SiO2 with CaCO3 or Fe2O3 cement)

Chert (likely flint) (Microcrystalline quartz, SiO₂) — sedimentary

Chert (likely flint)

Microcrystalline quartz, SiO₂

Zebra Jasper (Silicon Dioxide (SiO2) with various inclusions) — metamorphic/sedimentary

Zebra Jasper

Silicon Dioxide (SiO2) with various inclusions

metamorphic/sedimentary

Sandstone (Quartz-rich) (Sandstone (SiO2 dominated)) — sedimentary

Sandstone (Quartz-rich)

Sandstone (SiO2 dominated)

Dark metamorphic rock, likely slate or phyllite (Foliated metapelite; commonly mica-rich quartz–clay mineral assemblage) — metamorphic

Dark metamorphic rock, likely slate or phyllite

Foliated metapelite; commonly mica-rich quartz–clay mineral assemblage

Yellow Quartz (SiO2 (Crystalline Silicon Dioxide)) — mineral

Yellow Quartz

SiO2 (Crystalline Silicon Dioxide)

Moss Agate (Chalcedony (Silicon Dioxide) with dendritic inclusions (SiO2)) — mineral

Moss Agate

Chalcedony (Silicon Dioxide) with dendritic inclusions (SiO2)

Quartz (Milky Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Greenstone (likely chlorite- or epidote-rich metamorphic rock) (Greenstone; commonly metamorphosed basalt or dolerite, with chlorite, epidote, and actinolite) — metamorphic

Greenstone (likely chlorite- or epidote-rich metamorphic rock)

Greenstone; commonly metamorphosed basalt or dolerite, with chlorite, epidote, and actinolite

Unknown Organic Object (likely a berry or fruit) (Not applicable; this is not a geological specimen. If it were a cranberry, its scientific name would be Vaccinium macrocarpon; if a cherry, it would be Prunus avium or Prunus cerasus.) — Organic Material (likely a fruit or berry)

Unknown Organic Object (likely a berry or fruit)

Not applicable; this is not a geological specimen. If it were a cranberry, its scientific name would be Vaccinium macrocarpon; if a cherry, it would be Prunus avium or Prunus cerasus.

Organic Material (likely a fruit or berry)

Rough Topaz (Aluminum silicate fluoride hydroxide [Al2SiO4(F, OH)2]) — mineral

Rough Topaz

Aluminum silicate fluoride hydroxide [Al2SiO4(F, OH)2]

Rough quartz crystal, possibly smoky quartz (Quartz (silicon dioxide, SiO₂)) — mineral

Rough quartz crystal, possibly smoky quartz

Quartz (silicon dioxide, SiO₂)

Concrete Fragment (Hardened Portland cement and mineral aggregate) — sedimentary (anthropogenic)

Concrete Fragment

Hardened Portland cement and mineral aggregate

sedimentary (anthropogenic)

Milky quartz (Quartz (silicon dioxide, SiO₂)) — mineral

Milky quartz

Quartz (silicon dioxide, SiO₂)

Chalcedony (Agate/Jasper mix) (Cryptocrystalline Sillimanite (Quartz) - SiO2) — mineral

Chalcedony (Agate/Jasper mix)

Cryptocrystalline Sillimanite (Quartz) - SiO2

Marble (Metamorphic rock composed of Recrystallized Carbonate Minerals (chiefly CaCO3)) — metamorphic

Marble

Metamorphic rock composed of Recrystallized Carbonate Minerals (chiefly CaCO3)

Iron-rich vesicular rock, possibly slag or weathered basalt (Identification uncertain; likely ferruginous basalt/ironstone, with possible anthropogenic iron slag) — igneous

Iron-rich vesicular rock, possibly slag or weathered basalt

Identification uncertain; likely ferruginous basalt/ironstone, with possible anthropogenic iron slag

Hag Stone (Holed Quartzite Pebble) (Quartzite (SiO2 based) with natural vug or erosion hole) — sedimentary/metamorphic

Hag Stone (Holed Quartzite Pebble)

Quartzite (SiO2 based) with natural vug or erosion hole

sedimentary/metamorphic

Yellow calcite crystal specimen (Calcite (CaCO₃), likely honey/yellow calcite) — mineral

Yellow calcite crystal specimen

Calcite (CaCO₃), likely honey/yellow calcite

Emerald in Host Rock (Beryl (Be3Al2Si6O18) containing Chromium and/or Vanadium) — mineral

Emerald in Host Rock

Beryl (Be3Al2Si6O18) containing Chromium and/or Vanadium

Sandstone (Arenite (SiO2 based with quartz, feldspar, or lithic fragments)) — sedimentary

Sandstone

Arenite (SiO2 based with quartz, feldspar, or lithic fragments)

Milky quartz fragment (Quartz (silicon dioxide, SiO₂)) — mineral

Milky quartz fragment

Quartz (silicon dioxide, SiO₂)

Crinoid Stem Fossil (Crinoidea (Class)) — fossil

Crinoid Stem Fossil

Crinoidea (Class)

Blue Kyanite in Schist (Al2SiO5 in Mica Schist) — metamorphic

Blue Kyanite in Schist

Al2SiO5 in Mica Schist

Puddingstone (Conglomerate) — sedimentary

Puddingstone

Conglomerate

Green Kyanite (Kyanite (Al2SiO5)) — mineral

Green Kyanite

Kyanite (Al2SiO5)

Red Jasper (Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)) — mineral

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)

Native Copper (Native Copper (Cu)) — mineral

Native Copper

Native Copper (Cu)

Plume Agate or Moss Agate (Agate (SiO2)) — mineral

Plume Agate or Moss Agate

Agate (SiO2)

Basaltic Tuff / Volcanic Breccia (Pyroclastic Breccia / Lithic Tuff) — igneous

Basaltic Tuff / Volcanic Breccia

Pyroclastic Breccia / Lithic Tuff

Radiating stibnite crystals (Stibnite (antimony sulfide, Sb₂S₃)) — mineral

Radiating stibnite crystals

Stibnite (antimony sulfide, Sb₂S₃)