Rock Identifier

Category

Mineral Based Human Made Alloy

Browse mineral based human made alloy specimens identified by the Rock Identifier community.

Learn about Mineral Based Human Made Alloy in the encyclopedia

Carbonatite

Claystone

Marl

Dalmatian Jasper

Dalmatian Jasper

Gypsum

Opalite (Synthetic Glass (Simulated Opal)) — gemstone

Opalite

Synthetic Glass (Simulated Opal)

Slag (Industrial By-product) (Glassy silicate or metallic smelting residue) — mineral-like (anthropogenic)

Slag (Industrial By-product)

Glassy silicate or metallic smelting residue

mineral-like (anthropogenic)

Chert (Iron-stained) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Iron-stained)

Microcrystalline Quartz (SiO2)

Tumbled milky quartz pebble (Quartz (silicon dioxide, SiO₂), opaque-to-translucent milky variety) — mineral

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂), opaque-to-translucent milky variety

Green Aventurine (SiO2 (Silicon Dioxide with Fuchsite inclusions)) — mineral

Green Aventurine

SiO2 (Silicon Dioxide with Fuchsite inclusions)

Jasper (Iron-rich Chalcedony) (Jasper (Microcrystalline Silicon Dioxide, SiO2 plus iron oxide impurities)) — Sedimentary / Metamorphic

Jasper (Iron-rich Chalcedony)

Jasper (Microcrystalline Silicon Dioxide, SiO2 plus iron oxide impurities)

Sedimentary / Metamorphic

Dyed Agate (Agate (SiO2)) — Mineral

Dyed Agate

Agate (SiO2)

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

Quartz (Common or Milky)

Silicon Dioxide (SiO2)

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

Marble

Metamorphic rock composed of Recrystallized Carbonate Minerals (chiefly CaCO3)

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

Rough Topaz

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

Sunstone (Plagioclase Feldspar (Na,Ca)(Al,Si)4O8) — Mineral

Sunstone

Plagioclase Feldspar (Na,Ca)(Al,Si)4O8

Tumbled quartz (likely milky/clear quartz) (Quartz, silicon dioxide (SiO₂)) — mineral

Tumbled quartz (likely milky/clear quartz)

Quartz, silicon dioxide (SiO₂)

Tumbled milky quartz (Quartz (silicon dioxide, SiO₂)) — mineral

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Pink Granite (Phaneritic Felsic Igneous Rock (Granite, rich in Potassium Feldspar)) — igneous

Pink Granite

Phaneritic Felsic Igneous Rock (Granite, rich in Potassium Feldspar)

Likely iron-rich slag or weathered ironstone (Hematite–goethite-rich material (Fe₂O₃/FeO(OH)); possibly industrial iron slag) — mineral

Likely iron-rich slag or weathered ironstone

Hematite–goethite-rich material (Fe₂O₃/FeO(OH)); possibly industrial iron slag

Dolerite (Diabase) (Dolerite / Diabase) — igneous

Dolerite (Diabase)

Dolerite / Diabase

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

Chert (Flint)

Silicon Dioxide (SiO2)

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

Chert / Microcrystalline Quartz

Chert (SiO2)

Weathered pegmatite or feldspar-rich granite fragment (Granitic pegmatite, composed mainly of potassium feldspar and quartz, with minor mica; exact identification is uncertain from the photograph) — igneous

Weathered pegmatite or feldspar-rich granite fragment

Granitic pegmatite, composed mainly of potassium feldspar and quartz, with minor mica; exact identification is uncertain from the photograph

Sandstone Cobble (Arenite (Secondary classification based on grain size)) — sedimentary

Sandstone Cobble

Arenite (Secondary classification based on grain size)

Opalite (Synthetic Moonstone/Sea Opal) (Silicon Dioxide (SiO2) glass with metallic inclusions) — Synthetic/Man-made Glass

Opalite (Synthetic Moonstone/Sea Opal)

Silicon Dioxide (SiO2) glass with metallic inclusions

Synthetic/Man-made Glass

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Pebble (likely Sandstone or Granitic Pebble) (Clastic Sediment (or specific rock type, e.g., Arenite, Granitoid Pebble)) — Rock (likely Sedimentary)

Pebble (likely Sandstone or Granitic Pebble)

Clastic Sediment (or specific rock type, e.g., Arenite, Granitoid Pebble)

Rock (likely Sedimentary)

Tumbled jasper (likely picture jasper or iron-rich jasper) (Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides) — sedimentary

Tumbled jasper (likely picture jasper or iron-rich jasper)

Microcrystalline quartz/chalcedony, SiO₂, colored by iron oxides

Coquina (Bioclastic Limestone) — sedimentary

Coquina

Bioclastic Limestone

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

Chert

Chert (Microcrystalline Quartz, SiO2)

Banded Gneiss (Gneiss (Foliated Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (Foliated Metamorphic Rock)

Polished crescent-shaped stone pendant (Likely black jade, basalt, or other dark silicate stone; exact identification requires testing) — mineral

Polished crescent-shaped stone pendant

Likely black jade, basalt, or other dark silicate stone; exact identification requires testing

Iron (Hematite variety) (Iron (Fe) / Hematite (Fe2O3)) — mineral

Iron (Hematite variety)

Iron (Fe) / Hematite (Fe2O3)

Agate (Bead Form) (Agate (Cryptocrystalline Quartz, SiO2)) — mineral

Agate (Bead Form)

Agate (Cryptocrystalline Quartz, SiO2)

Banded Agate (often called Brown Agate or Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Banded Agate (often called Brown Agate or Chalcedony)

Silicon Dioxide (SiO2)

Turquoise (Blue Howlite / Magnesite imitation) (CuAl6(PO4)4(OH)8·4H2O (for natural Turquoise); Ca2B5SiO9(OH)5 (for Howlite)) — mineral

Turquoise (Blue Howlite / Magnesite imitation)

CuAl6(PO4)4(OH)8·4H2O (for natural Turquoise); Ca2B5SiO9(OH)5 (for Howlite)

Chakra Stone (Composite / Man-made Bonded Gemstones) (Composite of Quartz, Lapis Lazuli, Aventurine, Tiger's Eye, and Jasper (SiO2, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, etc.)) — Combined Minerals / Metaphysical stones

Chakra Stone (Composite / Man-made Bonded Gemstones)

Composite of Quartz, Lapis Lazuli, Aventurine, Tiger's Eye, and Jasper (SiO2, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, etc.)

Combined Minerals / Metaphysical stones

Tumbled carnelian agate with dark mineral inclusions (Carnelian, an orange variety of microcrystalline quartz (chalcedony), SiO₂; dark inclusions are likely iron oxides/hydroxides, possibly hematite, goethite, or a basaltic/matrix fragment) — gemstone

Tumbled carnelian agate with dark mineral inclusions

Carnelian, an orange variety of microcrystalline quartz (chalcedony), SiO₂; dark inclusions are likely iron oxides/hydroxides, possibly hematite, goethite, or a basaltic/matrix fragment

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

Chert (River Pebble)

Microcrystalline Quartz (SiO2)

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

Chert / Flint

Silicon Dioxide (SiO2)

Goldstone (N/A (Synthetic Glass with Copper Inclusions)) — Manufactured Glass

Goldstone

N/A (Synthetic Glass with Copper Inclusions)

Manufactured Glass

Banded Agate (Sedimentary Cryptocrystalline Quartz (SiO2)) — mineral

Banded Agate

Sedimentary Cryptocrystalline Quartz (SiO2)

Obsidian (Volcanic Glass (SiO2)) — igneous

Obsidian

Volcanic Glass (SiO2)

Likely galena-bearing ore specimen (Galena (PbS), possibly with quartz or calcite gangue) — mineral

Likely galena-bearing ore specimen

Galena (PbS), possibly with quartz or calcite gangue

Aquamarine (Beryl (Be3Al2Si6O18)) — mineral

Aquamarine

Beryl (Be3Al2Si6O18)

Halite (Rock Salt) (Halite (NaCl)) — mineral

Halite (Rock Salt)

Halite (NaCl)