Rock Identifier

Category

Mineral (Processed Alloy)

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

Milky Quartz with Iron Staining (Silicon Dioxide (SiO2) with Limonite/Goethite) — mineral

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2) with Limonite/Goethite

Blue Calcite (Calcium Carbonate (CaCO3)) — Mineral

Blue Calcite

Calcium Carbonate (CaCO3)

Red Jasper (Silicon Dioxide (SiO2) - Chalcedony) — mineral

Red Jasper

Silicon Dioxide (SiO2) - Chalcedony

Rose Quartz (Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese) — mineral

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Agate (Silicon dioxide (SiO2)) — mineral

Agate

Silicon dioxide (SiO2)

K-Feldspar (Potassium Feldspar) (Potassium Feldspar (KAlSi3O8)) — mineral

K-Feldspar (Potassium Feldspar)

Potassium Feldspar (KAlSi3O8)

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

Tumbled milky quartz

Quartz, silicon dioxide (SiO₂)

Quartz Vein in Host Rock (Silicon Dioxide (SiO2)) — mineral with metamorphic or sedimentary host

Quartz Vein in Host Rock

Silicon Dioxide (SiO2)

mineral with metamorphic or sedimentary host

Gossan (Iron Hat) (Limonitic Gossan (Fe2O3·nH2O)) — sedimentary

Gossan (Iron Hat)

Limonitic Gossan (Fe2O3·nH2O)

Olivine (Peridot) (Magnesium Iron Silicate (Mg, Fe)2SiO4) — mineral

Olivine (Peridot)

Magnesium Iron Silicate (Mg, Fe)2SiO4

Sandstone with Manganese Dendrites (Clastic Sedimentary Rock (SiO2 based with MnO2 inclusions)) — sedimentary

Sandstone with Manganese Dendrites

Clastic Sedimentary Rock (SiO2 based with MnO2 inclusions)

Porphyritic Basalt (Porphyritic Basalt with Plagioclase Phenocrysts) — igneous

Porphyritic Basalt

Porphyritic Basalt with Plagioclase Phenocrysts

Yellow Jasper (Silicon Dioxide (SiO2) - Impure Cryptocrystalline Quartz) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) - Impure Cryptocrystalline Quartz

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

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Fossilized Bone (Vertebrate Fossil Fragment (Calcium Phosphate / Hydroxyapatite)) — fossil

Fossilized Bone

Vertebrate Fossil Fragment (Calcium Phosphate / Hydroxyapatite)

Petrified Wood (Silicified Wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

Yellow Jasper (Silicon Dioxide (SiO2) with Goethite/Iron oxide inclusions) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with Goethite/Iron oxide inclusions

Tiger's Eye (Pseudomorph of quartz after crocidolite (SiO2)) — metamorphic

Tiger's Eye

Pseudomorph of quartz after crocidolite (SiO2)

Petrified Dinosaur Bone (Gembone) (Agatized Dinosaur Bone) — sedimentary

Petrified Dinosaur Bone (Gembone)

Agatized Dinosaur Bone

Cubic Zirconia (CZ) Jewelry (Zirconium dioxide (ZrO2)) — mineral (synthetic)

Cubic Zirconia (CZ) Jewelry

Zirconium dioxide (ZrO2)

mineral (synthetic)

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

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Granite (Granite (composed primarily of Quartz SiO2, Feldspar (KAlSi3O8), and Mica)) — igneous

Granite

Granite (composed primarily of Quartz SiO2, Feldspar (KAlSi3O8), and Mica)

Ammonite Fossil (Ammonoidea (subclass)) — sedimentary

Ammonite Fossil

Ammonoidea (subclass)

Sandstone Concretion (Ferruginous Sandstone Concretion (Primarily SiO2 with Iron Oxide cement)) — sedimentary

Sandstone Concretion

Ferruginous Sandstone Concretion (Primarily SiO2 with Iron Oxide cement)

Yellow Jasper (Silicon Dioxide (SiO2) with goethite or limonite inclusions) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with goethite or limonite inclusions

Fancy Jasper (Silicon Dioxide (SiO2) with mineral inclusions) — sedimentary

Fancy Jasper

Silicon Dioxide (SiO2) with mineral inclusions

Sandstone (Arenite (primarily composed of SiO2)) — sedimentary

Sandstone

Arenite (primarily composed of SiO2)

Dalmatian Jasper (Aplite with Arfvedsonite inclusions) — igneous

Dalmatian Jasper

Aplite with Arfvedsonite inclusions

Biotite Schist (Biotite Schist) — metamorphic

Biotite Schist

Biotite Schist

Jasper (Silicon dioxide (SiO2) with iron oxide inclusions) — sedimentary

Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Soapstone (Steatite (primarily composed of Talc, Mg₃Si₄O₁₀(OH)₂)) — Metamorphic Rock

Soapstone

Steatite (primarily composed of Talc, Mg₃Si₄O₁₀(OH)₂)

Metamorphic Rock

Turtle Stone / Septarian Nodule (Fragment) (Septarian Concretion (Calcite, Aragonite, and Limestone)) — sedimentary

Turtle Stone / Septarian Nodule (Fragment)

Septarian Concretion (Calcite, Aragonite, and Limestone)

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

Quartz (Alluvial Pebbles)

Silicon Dioxide (SiO2)

Sandstone Pebble (Sandstone (SiO2 rich clastic rock)) — sedimentary

Sandstone Pebble

Sandstone (SiO2 rich clastic rock)

Mahogany Obsidian (Volcanic glass (SiO2 with Fe2O3 inclusions)) — igneous

Mahogany Obsidian

Volcanic glass (SiO2 with Fe2O3 inclusions)

Granite Boulder (Intrusive Igneous Rock) — igneous

Granite Boulder

Intrusive Igneous Rock

Granite (Felsic intrusive igneous rock) — igneous

Granite

Felsic intrusive igneous rock

Quartz River Cobble (Silicon Dioxide (SiO2)) — mineral

Quartz River Cobble

Silicon Dioxide (SiO2)

Manganese Nodule (Polymetallic Nodule (Hydrous manganese and iron oxides)) — mineral

Manganese Nodule

Polymetallic Nodule (Hydrous manganese and iron oxides)

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

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

Greenstone (Metabasalt / Chlorite Schist) — metamorphic

Greenstone

Metabasalt / Chlorite Schist

Granite (Polished Countertop Surface) (Plutonic Igneous Rock (Felsic)) — igneous

Granite (Polished Countertop Surface)

Plutonic Igneous Rock (Felsic)