Rock Identifier

Category

Mineral (Processed Alloy)

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

Shark Tooth Fossil (Chondrichthyes fossil) — fossil

Shark Tooth Fossil

Chondrichthyes fossil

Mica Schist (Mica Schist (primarily Muscovite and Quartz)) — metamorphic

Mica Schist

Mica Schist (primarily Muscovite and Quartz)

Green Quartz (Aventurine or Green Quartzite) (SiO2 (Silicon Dioxide) with mica inclusions) — metamorphic

Green Quartz (Aventurine or Green Quartzite)

SiO2 (Silicon Dioxide) with mica inclusions

$Tiger\'s Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — metamorphic$

Tiger\'s Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Cubic Zirconia (Cubic Zirconia (Zirconium Dioxide, ZrO2)) — mineral

Cubic Zirconia

Cubic Zirconia (Zirconium Dioxide, ZrO2)

Beaded gemstone bracelet (Indeterminate; likely small polished mineral beads, possibly turquoise or dyed stone, with metal and glass components) — gemstone

Beaded gemstone bracelet

Indeterminate; likely small polished mineral beads, possibly turquoise or dyed stone, with metal and glass components

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — metamorphic

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Tiger's Eye (SiO2 (Quartz pseudomorph after crocidolite)) — mineral

Tiger's Eye

SiO2 (Quartz pseudomorph after crocidolite)

Pink Feldspar / Rhodochrosite (Tumbled Pink Quartzite) (SiO2 (Quartz) / KAlSi3O8 (Potassium Feldspar)) — mineral

Pink Feldspar / Rhodochrosite (Tumbled Pink Quartzite)

SiO2 (Quartz) / KAlSi3O8 (Potassium Feldspar)

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

Green Aventurine

Quartz (SiO2) with fuchsite inclusions

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

Dyed Chalcedony (Agate)

Silicon Dioxide (SiO2)

Yellow Quartz (Citrine/Yellow Jasper) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine/Yellow Jasper)

Silicon Dioxide (SiO2)

Mica Schist (Schist (Crystalline metamorphic rock)) — metamorphic

Mica Schist

Schist (Crystalline metamorphic rock)

Mammoth or Mastodon Tooth Fragment (Mammuthus / Mammut molar fragment) — fossil

Mammoth or Mastodon Tooth Fragment

Mammuthus / Mammut molar fragment

Rainbow Moonstone with Black Tourmaline (White Labradorite (Feldspar variety, (Na,Ca)(Al,Si)4O8) with Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)) — mineral

Rainbow Moonstone with Black Tourmaline

White Labradorite (Feldspar variety, (Na,Ca)(Al,Si)4O8) with Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

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

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Red Sandstone (Arenite (Ferruginous Sandstone)) — sedimentary

Red Sandstone

Arenite (Ferruginous Sandstone)

Turquoise and Hematite (CuAl6(PO4)4(OH)8·4H2O (Turquoise) and Fe2O3 (Hematite)) — mineral

Turquoise and Hematite

CuAl6(PO4)4(OH)8·4H2O (Turquoise) and Fe2O3 (Hematite)

Dinosaur Bone (Agatized Dinosaur Bone) — sedimentary/fossil

Dinosaur Bone

Agatized Dinosaur Bone

sedimentary/fossil

Yellow Calcite (Calcium Carbonate (CaCO3)) — mineral

Yellow Calcite

Calcium Carbonate (CaCO3)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Yellow serpentine (likely serpentine-rich rock) (Serpentinite; chiefly serpentine-group minerals, such as antigorite, lizardite, and chrysotile) — metamorphic

Yellow serpentine (likely serpentine-rich rock)

Serpentinite; chiefly serpentine-group minerals, such as antigorite, lizardite, and chrysotile

Mixed Tumbled Gemstones (Various silicate and oxide minerals) — mineral

Mixed Tumbled Gemstones

Various silicate and oxide minerals

Mixed Tumbled Gemstones and Minerals (Various silicate and oxide minerals) — mineral

Mixed Tumbled Gemstones and Minerals

Various silicate and oxide minerals

Mixed Rock and Mineral Collection (Multiple geological specimens) — mineral

Mixed Rock and Mineral Collection

Multiple geological specimens

Unidentified rough rock fragment (Indeterminate; the image does not show enough detail for a reliable mineral or rock identification) — igneous

Unidentified rough rock fragment

Indeterminate; the image does not show enough detail for a reliable mineral or rock identification

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Gray rock (possibly basalt or fine-grained granite) (Undetermined; no diagnostic minerals are visible) — igneous

Gray rock (possibly basalt or fine-grained granite)

Undetermined; no diagnostic minerals are visible

Snowflake Obsidian (Volcanic glass containing Spherulitic inclusions (SiO2 + impurities)) — igneous

Snowflake Obsidian

Volcanic glass containing Spherulitic inclusions (SiO2 + impurities)

Unidentified small stone fragments (Indeterminate; the image does not show enough detail to identify a mineral or rock species) — mineral

Unidentified small stone fragments

Indeterminate; the image does not show enough detail to identify a mineral or rock species

Possible polished or tumbled stone (Unidentified; the image does not show enough detail to determine its composition) — mineral

Possible polished or tumbled stone

Unidentified; the image does not show enough detail to determine its composition

Tumbled Gemstones Set (Mixed Quartz and Silicate Varieties) — gemstone

Tumbled Gemstones Set

Mixed Quartz and Silicate Varieties

Native Copper Bearing Basalt (Cu) — igneous

Native Copper Bearing Basalt

Cu

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Fossilized Shark Tooth (Chondrichthyes (Class) fossil) — fossil

Fossilized Shark Tooth

Chondrichthyes (Class) fossil

Small gray-green stone, likely a quartz-rich rock fragment (Undetermined silicate rock; image lacks enough detail for a reliable species-level identification) — igneous

Small gray-green stone, likely a quartz-rich rock fragment

Undetermined silicate rock; image lacks enough detail for a reliable species-level identification

Aquamarine (Beryl (Be3Al2Si6O18)) — gemstone

Aquamarine

Beryl (Be3Al2Si6O18)

Dumortierite Quartz (Dumortierite-bearing Quartz (SiO2 with Al7BO3(SiO4)3O3)) — mineral

Dumortierite Quartz

Dumortierite-bearing Quartz (SiO2 with Al7BO3(SiO4)3O3)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Unidentified tan-gray stone (Indeterminate from the blurry image; it may be a common silicate rock such as quartzite or granite.) — mineral

Unidentified tan-gray stone

Indeterminate from the blurry image; it may be a common silicate rock such as quartzite or granite.

Rose Quartz (Silicon Dioxide (SiO2)) — mineral

Rose Quartz

Silicon Dioxide (SiO2)