Rock Identifier

Category

Mineral (Processed Metal)

Browse mineral (processed metal) specimens identified by the Rock Identifier community.

Learn about Mineral (Processed Metal) in the encyclopedia

Cassiterite

Sperrylite

Brookite

Pyrite

Acanthite

Aventurine Feldspar

Aventurine Feldspar

Galena

Bronzite

Gold Sheen Obsidian

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Pegmatitic granite (likely feldspar–quartz–mica rock) (Coarse-grained granitic pegmatite; primarily quartz (SiO₂), feldspar, and mica, with possible epidote or chlorite) — igneous

Pegmatitic granite (likely feldspar–quartz–mica rock)

Coarse-grained granitic pegmatite; primarily quartz (SiO₂), feldspar, and mica, with possible epidote or chlorite

Pyrite in Quartz (FeS2 (Iron Pyrite) with SiO2 (Quartz)) — Mineral/Igneous/Hydrothermal

Pyrite in Quartz

FeS2 (Iron Pyrite) with SiO2 (Quartz)

Mineral/Igneous/Hydrothermal

Weathered iron-rich rock fragment (Likely limonite/goethite-rich ironstone; exact identification requires testing) — mineral

Weathered iron-rich rock fragment

Likely limonite/goethite-rich ironstone; exact identification requires testing

Quartz Pebble (Quartz (Silicon Dioxide, SiO2)) — mineral

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Iron-oxide-rich weathered rock (Limonite/goethite-bearing ironstone; chiefly hydrated iron oxides, often FeO(OH)·nH₂O) — mineral

Iron-oxide-rich weathered rock

Limonite/goethite-bearing ironstone; chiefly hydrated iron oxides, often FeO(OH)·nH₂O

Aventurine (Quartz (SiO2) with inclusions of Fuchsite) — mineral

Aventurine

Quartz (SiO2) with inclusions of Fuchsite

Milky Quartz with Iron Oxide Weathering (Silicon Dioxide (SiO2) with Goethite/Limonite coatings) — mineral

Milky Quartz with Iron Oxide Weathering

Silicon Dioxide (SiO2) with Goethite/Limonite coatings

Dark metallic sulfide specimen, possibly galena (Galena (lead sulfide, PbS), identification tentative) — mineral

Dark metallic sulfide specimen, possibly galena

Galena (lead sulfide, PbS), identification tentative

Copper Ore (Mixed copper sulfides/oxides in gangue matrix) — mineral

Copper Ore

Mixed copper sulfides/oxides in gangue matrix

Lepidolite (K(Li,Al)3(Al,Si,3O10)(F,OH)2) — mineral

Lepidolite

K(Li,Al)3(Al,Si,3O10)(F,OH)2

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Blue-green crystal point, likely fluorite (Fluorite (CaF₂), tentative visual identification) — mineral

Blue-green crystal point, likely fluorite

Fluorite (CaF₂), tentative visual identification

Chalcopyrite (Peacock Ore) (Copper Iron Sulfide (CuFeS2)) — mineral

Chalcopyrite (Peacock Ore)

Copper Iron Sulfide (CuFeS2)

Black Chert (Flint / Basanite) (Microcrystalline / Cryptocrystalline Quartz (SiO2)) — sedimentary

Black Chert (Flint / Basanite)

Microcrystalline / Cryptocrystalline Quartz (SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

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

Granite

Intrusive igneous rock primarily composed of quartz, alkali feldspar, and plagioclase

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

Quartz Vein / Milky Quartz

Silicon Dioxide (SiO2)

Likely quartz-rich rock fragment (Quartz (SiO₂), possibly a fragment of quartzite or silica-rich slag) — mineral

Likely quartz-rich rock fragment

Quartz (SiO₂), possibly a fragment of quartzite or silica-rich slag

Feldspar-Quartz Rock (likely Pegmatite or Granite) (Feldspar-Quartz composite rock (KAlSi3O8 - SiO2)) — igneous

Feldspar-Quartz Rock (likely Pegmatite or Granite)

Feldspar-Quartz composite rock (KAlSi3O8 - SiO2)

Galena (Lead(II) sulfide (PbS)) — mineral

Galena

Lead(II) sulfide (PbS)

Cobalt Blue Glass / Cullet Glass (Silicon dioxide (Amorphous man-made glass)) — mineral

Cobalt Blue Glass / Cullet Glass

Silicon dioxide (Amorphous man-made glass)

Silver Nugget (Native Silver (Ag)) — mineral

Silver Nugget

Native Silver (Ag)

Gold Nugget (Native Gold (Au)) — mineral

Gold Nugget

Native Gold (Au)

Gold in Quartz Matrix (Native Gold (Au) with Quartz (SiO2) and Slate/Shale) — mineral

Gold in Quartz Matrix

Native Gold (Au) with Quartz (SiO2) and Slate/Shale

Quartz Vein Rock (Quartz (Silicon Dioxide, SiO2)) — igneous

Quartz Vein Rock

Quartz (Silicon Dioxide, SiO2)

Ferruginous Sandstone (Sandstone with Iron Oxide (Limonite/Goethite)) — sedimentary

Ferruginous Sandstone

Sandstone with Iron Oxide (Limonite/Goethite)

Iron-stained Quartz (Gossan/Limonite-coated Quartz) (Silicon Dioxide (SiO2) with Hydrated Iron Oxides (FeO(OH)·nH2O)) — mineral

Iron-stained Quartz (Gossan/Limonite-coated Quartz)

Silicon Dioxide (SiO2) with Hydrated Iron Oxides (FeO(OH)·nH2O)

Rounded river pebble, possibly iron-rich quartzite or basalt (Indeterminate from image; likely fine-grained basalt (mafic silicate rock) or ferruginous quartzite) — igneous

Rounded river pebble, possibly iron-rich quartzite or basalt

Indeterminate from image; likely fine-grained basalt (mafic silicate rock) or ferruginous quartzite

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

Sunstone

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

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Amygdaloidal Basalt (Basalt with secondary mineral infilling) — igneous

Amygdaloidal Basalt

Basalt with secondary mineral infilling

Granite (Intrusive igneous rock) — igneous

Granite

Intrusive igneous rock

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Dyed Howlite (simulating Lavender/Purple Jade or Charoite) (Howlite: Ca2B5SiO9(OH)5 (when natural)) — Mineral

Dyed Howlite (simulating Lavender/Purple Jade or Charoite)

Howlite: Ca2B5SiO9(OH)5 (when natural)

Amethyst cabochon jewelry (Amethyst, purple variety of quartz (SiO₂)) — gemstone

Amethyst cabochon jewelry

Amethyst, purple variety of quartz (SiO₂)

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Ruby (mounted cabochon) (Corundum, Al₂O₃; red color typically from chromium) — gemstone

Ruby (mounted cabochon)

Corundum, Al₂O₃; red color typically from chromium

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)