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

Sard

White Obsidian

White Obsidian

Glauconite

Glauconite

Halite

Halite

Hutcheonite

Hutcheonite

Sperrylite

Sperrylite

Baddeleyite

Baddeleyite

Anatase

Anatase

Brookite

Brookite

Talc

Talc

Euxenite

Euxenite

Eltyubyuite

Eltyubyuite

Chert (Chert Nodule) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Chert Nodule)

Microcrystalline quartz (SiO2)

Fluorite (Fluorite (Calcium Fluoride, CaF2)) — mineral

Fluorite

Fluorite (Calcium Fluoride, CaF2)

Dinosaur Bone (Agatized Dinosaur Bone) — sedimentary/fossil

Dinosaur Bone

Agatized Dinosaur Bone

sedimentary/fossil

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

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

Sandstone

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

Turquenite (Dyed Howlite) (Dyed Ca2B5SiO9(OH)5 (Calcium Borosilicate Hydroxide)) — mineral

Turquenite (Dyed Howlite)

Dyed Ca2B5SiO9(OH)5 (Calcium Borosilicate Hydroxide)

Dyed Agate / Painted Stone (Silicon Dioxide (SiO2) with artificial pigment) — sedimentary (base), then artificial

Dyed Agate / Painted Stone

Silicon Dioxide (SiO2) with artificial pigment

sedimentary (base), then artificial

Dyed Blue Agate (Silicon Dioxide (SiO2) with artificial cobalt-based dye) — mineral

Dyed Blue Agate

Silicon Dioxide (SiO2) with artificial cobalt-based dye

Peridot (likely, based on color and appearance) (Olivine group mineral, specifically (Mg,Fe)2SiO4 (Forsterite-Fayalite solid solution series)) — Mineral

Peridot (likely, based on color and appearance)

Olivine group mineral, specifically (Mg,Fe)2SiO4 (Forsterite-Fayalite solid solution series)

Silver (Native Element) (Ag (Argentum) - 90% Silver, 10% Copper alloy in specimen) — mineral

Silver (Native Element)

Ag (Argentum) - 90% Silver, 10% Copper alloy in specimen

Quartzite (Quartzite (mostly SiO2)) — metamorphic

Quartzite

Quartzite (mostly SiO2)

Iron Meteorite (Iron-Nickel Meteorite (primarily composed of kamacite and taenite alloys)) — Mineral

Iron Meteorite

Iron-Nickel Meteorite (primarily composed of kamacite and taenite alloys)

Bumble Bee Jasper (Calcite and Volcanic Ash Mixture) — sedimentary

Bumble Bee Jasper

Calcite and Volcanic Ash Mixture

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Echinoid Fossil (Commonly called a Sea Urchin or Heart Urchin) (Phylum Echinodermata, Class Echinoidea) — sedimentary

Echinoid Fossil (Commonly called a Sea Urchin or Heart Urchin)

Phylum Echinodermata, Class Echinoidea

Chert (varieties include Flint and Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Chert (varieties include Flint and Jasper)

Silicon Dioxide (SiO2)

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

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Native Gold (in earring form) (Gold (Au)) — mineral

Native Gold (in earring form)

Gold (Au)

Gold (Native Gold (Au)) — mineral

Gold

Native Gold (Au)

Basalt (with Brass Inlay) (Basalt (Mafic volcanic rock)) — igneous

Basalt (with Brass Inlay)

Basalt (Mafic volcanic rock)

Orange Quartzite (Tumble-polished) (Quartzite (primarily SiO2)) — metamorphic

Orange Quartzite (Tumble-polished)

Quartzite (primarily SiO2)

Obsidian Arrowhead (Volcanic Glass (Primary composition: SiO2)) — igneous

Obsidian Arrowhead

Volcanic Glass (Primary composition: SiO2)

Fossilized Coral (Petoskey Stone type) (Hexagonaria percarinata (Order: Rugosa)) — sedimentary

Fossilized Coral (Petoskey Stone type)

Hexagonaria percarinata (Order: Rugosa)

Fossilized Tabulate Coral (Honeycomb Coral) (Favosites (Order: Tabulata)) — sedimentary

Fossilized Tabulate Coral (Honeycomb Coral)

Favosites (Order: Tabulata)

Fossilized Brachiopod (Brachiopoda (likely Order Spiriferida or Productida)) — sedimentary

Fossilized Brachiopod

Brachiopoda (likely Order Spiriferida or Productida)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Epidote (Unakite variety) (Epidosite (Metasomatic rock containing Ca2(Al,Fe)3(SiO4)3(OH))) — metamorphic

Epidote (Unakite variety)

Epidosite (Metasomatic rock containing Ca2(Al,Fe)3(SiO4)3(OH))

Chert (often called Flint when dark) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint when dark)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Gold Ore in Quartz/Matrix (Native Gold (Au) in Quartz (SiO2) matrix) — mineral

Gold Ore in Quartz/Matrix

Native Gold (Au) in Quartz (SiO2) matrix

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

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

River Stone (likely Basalt or Diabase) (Mafic Igneous Rock (likely Basalt)) — igneous

River Stone (likely Basalt or Diabase)

Mafic Igneous Rock (likely Basalt)

Siltstone (Siltstone (primarily SiO2 with Al2O3)) — sedimentary

Siltstone

Siltstone (primarily SiO2 with Al2O3)

Zebra Jasper (Zebra Stone) (Tumbled Silicon Dioxide (SiO2) with impurities) — sedimentary

Zebra Jasper (Zebra Stone)

Tumbled Silicon Dioxide (SiO2) with impurities

Bumblebee Jasper (Hydrothermal Volcanic Rock (Primarily Calcite with Orpiment - As2S3, Realgar, and Pyrite)) — igneous

Bumblebee Jasper

Hydrothermal Volcanic Rock (Primarily Calcite with Orpiment - As2S3, Realgar, and Pyrite)

Granite (Granite (Phaneritic intrusive igneous rock; primarily SiO2 and Al2O3)) — igneous

Granite

Granite (Phaneritic intrusive igneous rock; primarily SiO2 and Al2O3)

Basalt (Basalt (Aphanitic Mafic Igneous Rock)) — igneous

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

Peridotite (Peridotite (primarily Olivine and Pyroxene)) — igneous

Peridotite

Peridotite (primarily Olivine and Pyroxene)

Gold Ore (Native Gold (Au)) — mineral

Gold Ore

Native Gold (Au)

Gold Flake (Native Gold (Au)) — mineral

Gold Flake

Native Gold (Au)

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

Granite (Phaneritic Plutonic Igneous Rock (composed of quartz, alkali feldspar, and plagioclase)) — igneous

Granite

Phaneritic Plutonic Igneous Rock (composed of quartz, alkali feldspar, and plagioclase)