Rock Identifier

Category

Mineral (Processed Alloy)

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

Small rough rock fragment (Undetermined; the image does not show enough detail for a reliable identification) — igneous

Small rough rock fragment

Undetermined; the image does not show enough detail for a reliable identification

Olive Jade (Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2)) — mineral

Olive Jade

Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2)

Amazonite (Microcline feldspar (KAlSi3O8)) — mineral

Amazonite

Microcline feldspar (KAlSi3O8)

Amazonite (Microcline feldspar (KAlSi3O8)) — mineral

Amazonite

Microcline feldspar (KAlSi3O8)

Frosted Quartz (Silicon Dioxide (SiO2)) — mineral

Frosted Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Sandstone River Cobble (Arenite (predominantly SiO2)) — sedimentary

Sandstone River Cobble

Arenite (predominantly SiO2)

Fossilized Bone (Petrified Bone / Biogenic Sedimentary) — fossil

Fossilized Bone

Petrified Bone / Biogenic Sedimentary

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

Lepidolite

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

Dyed Agate Geode (Silicon Dioxide (SiO2) - Chalcedony variety) — mineral

Dyed Agate Geode

Silicon Dioxide (SiO2) - Chalcedony variety

Aventurine Quartz (Silicon dioxide with fuchsite inclusions (SiO2)) — mineral

Aventurine Quartz

Silicon dioxide with fuchsite inclusions (SiO2)

River Stone / Pebble (Clastic Sediment (composed largely of Quartz, Feldspar, and various rock fragments)) — Mineral, Sediment

River Stone / Pebble

Clastic Sediment (composed largely of Quartz, Feldspar, and various rock fragments)

Mineral, Sediment

Magnetite (Magnetite (Fe3O4)) — mineral

Magnetite

Magnetite (Fe3O4)

Blue Topaz (Aluminum silicate fluoride hydroxide, Al2SiO4(F,OH)2) — gemstone

Blue Topaz

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

Imperial Topaz (Aluminum Silicate Fluoride Hydroxide, Al2SiO4(F,OH)2) — gemstone

Imperial Topaz

Aluminum Silicate Fluoride Hydroxide, Al2SiO4(F,OH)2

Sugilite in Quartz (KNa2(Fe,Mn,Al)2Li3Si12O30) — mineral

Sugilite in Quartz

KNa2(Fe,Mn,Al)2Li3Si12O30

Amazonite (Microcline (K(AlSi3O8))) — mineral

Amazonite

Microcline (K(AlSi3O8))

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

White Quartz Pebbles

Silicon Dioxide (SiO2)

Amethyst (Silicon Dioxide (SiO2)) — mineral

Amethyst

Silicon Dioxide (SiO2)

Hematite Rose (Iron Oxide, Fe2O3) — mineral

Hematite Rose

Iron Oxide, Fe2O3

Bauxite (Aluminium ore (Hydrated aluminium oxides AlOx(OH)3-2x)) — sedimentary

Bauxite

Aluminium ore (Hydrated aluminium oxides AlOx(OH)3-2x)

Not a geological specimen (N/A (man-made object)) — N/A

Not a geological specimen

N/A (man-made object)

Green Apatite on Albite (Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]) — mineral

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]

Tourmaline (Schorl (Sodium Iron Aluminum Boron Silicate Hydroxide)) — mineral

Tourmaline

Schorl (Sodium Iron Aluminum Boron Silicate Hydroxide)

Small dark, polished stone—possibly hematite or magnetite (Indeterminate from the photograph; candidates include hematite (Fe₂O₃) and magnetite (Fe₃O₄)) — mineral

Small dark, polished stone—possibly hematite or magnetite

Indeterminate from the photograph; candidates include hematite (Fe₂O₃) and magnetite (Fe₃O₄)

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

K-Feldspar (Microcline / Orthoclase) (Potassium Feldspar (KAlSi3O8)) — mineral

K-Feldspar (Microcline / Orthoclase)

Potassium Feldspar (KAlSi3O8)

Dyed Agate (Silicon Dioxide (SiO2) - variety Chalcedony) — mineral

Dyed Agate

Silicon Dioxide (SiO2) - variety Chalcedony

Blue Apatite (Apatite-(CaF), Ca5(PO4)3F) — mineral

Blue Apatite

Apatite-(CaF), Ca5(PO4)3F

Sunstone (Feldspar) ((Ca,Na)((Al,Si)2Si2O8) with inclusions of Hematite or Goethite) — mineral

Sunstone (Feldspar)

(Ca,Na)((Al,Si)2Si2O8) with inclusions of Hematite or Goethite

Apatite (Calcium phosphate fluorapatite, Ca5(PO4)3(F,Cl,OH)) — mineral

Apatite

Calcium phosphate fluorapatite, Ca5(PO4)3(F,Cl,OH)

Gemstone Art Panel (Jade, Quartz, and Soapstone) (Composite of silicate minerals (Nephrite, Quartz, Talc/Soapstone)) — mineral

Gemstone Art Panel (Jade, Quartz, and Soapstone)

Composite of silicate minerals (Nephrite, Quartz, Talc/Soapstone)

Aura Quartz (Coated Quartz) (Silicon Dioxide (SiO2) coated with vaporized metals) — mineral

Aura Quartz (Coated Quartz)

Silicon Dioxide (SiO2) coated with vaporized metals

Banded Sedimentary Rock (Siliciclastic Sedimentary Rock) — sedimentary

Banded Sedimentary Rock

Siliciclastic Sedimentary Rock

Red Sandstone (Arenite (Ferruginous Sandstone)) — sedimentary

Red Sandstone

Arenite (Ferruginous Sandstone)

Chert (Arrowhead Fragment) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Arrowhead Fragment)

Microcrystalline Quartz (SiO2)

Snowflake Obsidian (Volcanic Glass (SiO2) with Cristobalite inclusions) — igneous

Snowflake Obsidian

Volcanic Glass (SiO2) with Cristobalite inclusions

Ironstone with possible iron-oxide staining (Iron-rich limonite/goethite; exact identification requires testing) — mineral

Ironstone with possible iron-oxide staining

Iron-rich limonite/goethite; exact identification requires testing

Sandstone (Ferruginous) (Arenite with Iron-Oxide Cement (primarily SiO2 with Fe2O3/FeOOH)) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron-Oxide Cement (primarily SiO2 with Fe2O3/FeOOH)

Sulfur (Sulfur (S)) — mineral

Sulfur

Sulfur (S)

Shark Tooth Fossil (Selachii fossil) — fossil

Shark Tooth Fossil

Selachii fossil

Unidentified mineral specimen, possibly quartz-bearing rock (Undetermined from the photograph; no diagnostic mineral or rock name can be assigned reliably.) — mineral

Unidentified mineral specimen, possibly quartz-bearing rock

Undetermined from the photograph; no diagnostic mineral or rock name can be assigned reliably.