Rock Identifier

Category

Mineral (Processed Alloy)

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

Blue Quartz (Silicon Dioxide (SiO2) with inclusions) — mineral

Blue Quartz

Silicon Dioxide (SiO2) with inclusions

Taaffeite (BeMgAl4O8 (Beryllium Magnesium Aluminum Oxide)) — mineral

Taaffeite

BeMgAl4O8 (Beryllium Magnesium Aluminum Oxide)

Green Calcite (Calcium Carbonate (CaCO3)) — mineral

Green Calcite

Calcium Carbonate (CaCO3)

Assorted Tumbled Gemstones (Mixed oxides and silicates (including Quartz, Chalcedony, and Feldspar variants)) — mineral

Assorted Tumbled Gemstones

Mixed oxides and silicates (including Quartz, Chalcedony, and Feldspar variants)

Unidentified pink-and-green mineral-bearing rock (Not reliably identifiable from the image; possible pink feldspar with green epidote or another green mineral) — mineral

Unidentified pink-and-green mineral-bearing rock

Not reliably identifiable from the image; possible pink feldspar with green epidote or another green mineral

Fossil Shark Tooth (Chondrichthyes (tooth)) — fossil

Fossil Shark Tooth

Chondrichthyes (tooth)

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

Petrified Wood

Silicified wood (primarily SiO2)

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

Lepidolite

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

Magnetite (Iron(II,III) oxide, Fe3O4) — mineral

Magnetite

Iron(II,III) oxide, Fe3O4

Kidney Stone (Calcium Oxalate / Uric Acid) (Calcium Oxalate Monohydrate (Whewellite) / Calcium Oxalate Dihydrate (Weddellite)) — mineral

Kidney Stone (Calcium Oxalate / Uric Acid)

Calcium Oxalate Monohydrate (Whewellite) / Calcium Oxalate Dihydrate (Weddellite)

Prehnite (Prehnite (Ca2Al(AlSi3O10)(OH)2)) — mineral

Prehnite

Prehnite (Ca2Al(AlSi3O10)(OH)2)

Amazonite (Microcline feldspar (KAlSi3O8)) — mineral

Amazonite

Microcline feldspar (KAlSi3O8)

Chalcopyrite in Quartz (Gossan/Iron Hat) (CuFeS2 (Chalcopyrite) with SiO2 (Quartz)) — mineral

Chalcopyrite in Quartz (Gossan/Iron Hat)

CuFeS2 (Chalcopyrite) with SiO2 (Quartz)

Likely polished quartz or glass-like mineral cabochon (Probably quartz (SiO₂), though the image cannot exclude man-made glass) — mineral

Likely polished quartz or glass-like mineral cabochon

Probably quartz (SiO₂), though the image cannot exclude man-made glass

Yellow Quartz Pebble (SiO2 (Silicon Dioxide) with Iron Impurities) — mineral

Yellow Quartz Pebble

SiO2 (Silicon Dioxide) with Iron Impurities

Sulfur (native sulfur) (Native sulfur, S₈) — mineral

Sulfur (native sulfur)

Native sulfur, S₈

Likely tumbled yellow-orange mineral or glassy stone (Indeterminate from photograph; possibilities include yellow jasper, calcite, agate, or dyed quartz) — mineral

Likely tumbled yellow-orange mineral or glassy stone

Indeterminate from photograph; possibilities include yellow jasper, calcite, agate, or dyed quartz

Banded Sandstone / Quartzite Pebble (Sedimentary quartz arenite with liesegang banding) — sedimentary

Banded Sandstone / Quartzite Pebble

Sedimentary quartz arenite with liesegang banding

Yellow Aventurine (Yellow Quartzite) (Silicon Dioxide (SiO2) with inclusions) — metamorphic

Yellow Aventurine (Yellow Quartzite)

Silicon Dioxide (SiO2) with inclusions

Lepidolite (K(Li,Al)3(Si,Al)4O10(F,OH)2) — mineral

Lepidolite

K(Li,Al)3(Si,Al)4O10(F,OH)2

Tourmaline in Quartz (Schorl in SiO2) — mineral

Tourmaline in Quartz

Schorl in SiO2

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Green Aventurine (Quartz with fuchsite inclusions (SiO2)) — mineral

Green Aventurine

Quartz with fuchsite inclusions (SiO2)

Cream-colored tumbled stone, possibly calcite (Unidentified; appearance alone is insufficient to distinguish calcite from other pale minerals or stone) — mineral

Cream-colored tumbled stone, possibly calcite

Unidentified; appearance alone is insufficient to distinguish calcite from other pale minerals or stone

Quartz Vein in Matrix (Silicon Dioxide (SiO2) within Rhyolitic or Granitic Matrix) — igneous

Quartz Vein in Matrix

Silicon Dioxide (SiO2) within Rhyolitic or Granitic Matrix

Tiger's Eye (Silicon Dioxide (SiO2) with fibrous inclusions) — mineral

Tiger's Eye

Silicon Dioxide (SiO2) with fibrous inclusions

Blue Apatite (Fluorapatite (Ca5(PO4)3F)) — mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Petrified Wood (Silicified Wood (SiO2)) — fossil

Petrified Wood

Silicified Wood (SiO2)

Muscovite Mica (Muscovite (KAl2(AlSi3O10)(OH)2)) — mineral

Muscovite Mica

Muscovite (KAl2(AlSi3O10)(OH)2)

Gold (Elemental Metal) (Gold (Au)) — Mineral

Gold (Elemental Metal)

Gold (Au)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Generic Rock Sample (Undetermined geological specimen) — igneous

Generic Rock Sample

Undetermined geological specimen

Shark Tooth Fossil (Carcharocles megalodon or similar extinct shark tooth) — fossil

Shark Tooth Fossil

Carcharocles megalodon or similar extinct shark tooth

Fossil Shark Tooth (Chondrichthyes (fossilized dentition)) — fossil

Fossil Shark Tooth

Chondrichthyes (fossilized dentition)

Small rough mineral/rock fragment (Unidentified; image detail is insufficient for a reliable species identification) — mineral

Small rough mineral/rock fragment

Unidentified; image detail is insufficient for a reliable species identification

Assorted mineral and rock collection (Mixed specimens; individual species cannot be reliably identified from the image) — mineral

Assorted mineral and rock collection

Mixed specimens; individual species cannot be reliably identified from the image

Unidentified dark rock fragment (Likely fine-grained mafic mineral aggregate; exact identification requires testing) — mineral

Unidentified dark rock fragment

Likely fine-grained mafic mineral aggregate; exact identification requires testing

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Blue Apatite (Fluorapatite (Ca5(PO4)3F)) — mineral

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Eagle Eye / Grey Tiger Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — mineral

Eagle Eye / Grey Tiger Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Pink Fire Quartz (Quartz (SiO2) with Hematite or Lepidocrocite inclusions) — mineral

Pink Fire Quartz

Quartz (SiO2) with Hematite or Lepidocrocite inclusions