Rock Identifier

Category

Mineral, Part Of A Rock

Browse mineral, part of a rock specimens identified by the Rock Identifier community.

Learn about Mineral, Part Of A Rock in the encyclopedia

Rock Salt

Calc-Silicate Rock

Calc-Silicate Rock

Halite

Dolomite

Gypsum

Coal

Claystone

Particolored Tourmaline

Serpentinite

Carbonatite

Skarn

Schist

Granite (Granite (Felsic Intrusive Igneous Rock)) — igneous

Granite

Granite (Felsic Intrusive Igneous Rock)

Riverstone (likely Gray Slate or Siltstone) (Metamorphosed fine-grained sedimentary rock (Argillite/Slate)) — metamorphic

Riverstone (likely Gray Slate or Siltstone)

Metamorphosed fine-grained sedimentary rock (Argillite/Slate)

Chalk (Calcium Carbonate (CaCO3)) — sedimentary

Chalk

Calcium Carbonate (CaCO3)

Coal (Bituminous or Anthracite) (Carbonaceous sedimentary rock (primarily Carbon, C)) — sedimentary

Coal (Bituminous or Anthracite)

Carbonaceous sedimentary rock (primarily Carbon, C)

Peridotite (Dunite/Peridot Xenolith) (Peridotite (predominantly Olivine (Mg, Fe)2SiO4)) — igneous

Peridotite (Dunite/Peridot Xenolith)

Peridotite (predominantly Olivine (Mg, Fe)2SiO4)

Basalt (River Pebble) (Basalt) — igneous

Basalt (River Pebble)

Basalt

Small translucent mineral fragment, possibly quartz (Quartz (SiO₂), tentative identification) — mineral

Small translucent mineral fragment, possibly quartz

Quartz (SiO₂), tentative identification

Likely weathered granite or granitic gneiss (Granite: quartz–feldspar–mica aggregate; possibly foliated gneiss) — igneous

Likely weathered granite or granitic gneiss

Granite: quartz–feldspar–mica aggregate; possibly foliated gneiss

Weathered granite or granitic pegmatite fragment (Granite; chiefly quartz (SiO₂), feldspar, and mica, possibly iron-oxide alteration) — igneous

Weathered granite or granitic pegmatite fragment

Granite; chiefly quartz (SiO₂), feldspar, and mica, possibly iron-oxide alteration

Siltstone with Quartz Vein (Siltstone (composed of Quartz and Clay minerals) with a hydrothermal Quartz vein (SiO2)) — sedimentary

Siltstone with Quartz Vein

Siltstone (composed of Quartz and Clay minerals) with a hydrothermal Quartz vein (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Granite Pebble (Granite (composed primarily of Quartz, Feldspar, and Mica/Amphibole)) — igneous

Granite Pebble

Granite (composed primarily of Quartz, Feldspar, and Mica/Amphibole)

Granite (River-worn Cobble) (Phaneritic Felsic Igneous Rock (primarily Quartz, Potassium Feldspar, and Plagioclase)) — igneous

Granite (River-worn Cobble)

Phaneritic Felsic Igneous Rock (primarily Quartz, Potassium Feldspar, and Plagioclase)

Weathered gray pebble, likely basalt or andesite (Fine-grained mafic to intermediate volcanic rock; probable basalt (plagioclase ± pyroxene/olivine)) — igneous

Weathered gray pebble, likely basalt or andesite

Fine-grained mafic to intermediate volcanic rock; probable basalt (plagioclase ± pyroxene/olivine)

Quartz Pebble (Silicon Dioxide (SiO2)) — Mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Light-colored weathered stone, likely limestone (Limestone, predominantly calcite (CaCO₃)) — sedimentary

Light-colored weathered stone, likely limestone

Limestone, predominantly calcite (CaCO₃)

Basalt (River Stone) (Mafic volcanic rock) — igneous

Basalt (River Stone)

Mafic volcanic rock

Andesite (Andesite) — igneous

Andesite

Andesite

Basalt River Cobble (Basalt (Mafic Extrusive Igneous Rock)) — igneous

Basalt River Cobble

Basalt (Mafic Extrusive Igneous Rock)

Quartz-rich granitic fragment (Likely granite or granitic pegmatite; chiefly quartz (SiO₂) with feldspar and possibly mica) — igneous

Quartz-rich granitic fragment

Likely granite or granitic pegmatite; chiefly quartz (SiO₂) with feldspar and possibly mica

Basalt (Basalt) — igneous

Basalt

Basalt

Siltstone or Fine-grained Sandstone pebble (Siltstone (primarily SiO2 with clay minerals)) — sedimentary

Siltstone or Fine-grained Sandstone pebble

Siltstone (primarily SiO2 with clay minerals)

Small rounded pebble, likely sandstone or weathered limestone (Indeterminate clastic carbonate/siliciclastic pebble; mineral composition appears dominated by quartz, feldspar, and/or calcite) — sedimentary

Small rounded pebble, likely sandstone or weathered limestone

Indeterminate clastic carbonate/siliciclastic pebble; mineral composition appears dominated by quartz, feldspar, and/or calcite

Pink Granite (Phaneritic Felsic Igneous Rock (Quartz-Feldspar-Mica)) — igneous

Pink Granite

Phaneritic Felsic Igneous Rock (Quartz-Feldspar-Mica)

Gneiss with Quartz Vein (Gneiss (containing SiO2 vein)) — metamorphic

Gneiss with Quartz Vein

Gneiss (containing SiO2 vein)

Granite Pebble (Granite (plutonic felsic intrusive rock)) — igneous

Granite Pebble

Granite (plutonic felsic intrusive rock)

Granite pebble (Granite, typically quartz–feldspar–mica aggregate) — igneous

Granite pebble

Granite, typically quartz–feldspar–mica aggregate

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Weathered quartz-rich pebble (Likely granitic or felsic igneous rock; quartz (SiO₂) with feldspar and minor mafic minerals) — igneous

Weathered quartz-rich pebble

Likely granitic or felsic igneous rock; quartz (SiO₂) with feldspar and minor mafic minerals

Water-worn black pebble, likely basalt (Basalt (fine-grained mafic volcanic rock; identification from the image is provisional)) — igneous

Water-worn black pebble, likely basalt

Basalt (fine-grained mafic volcanic rock; identification from the image is provisional)

Basalt (River Pebble) (Basalt) — igneous

Basalt (River Pebble)

Basalt

Milky quartz (Quartz (SiO₂), commonly called milky quartz) — mineral

Milky quartz

Quartz (SiO₂), commonly called milky quartz

Granite (Phaneritic Igneous Rock (Granitic)) — igneous

Granite

Phaneritic Igneous Rock (Granitic)

Quartz-rich metallic sulfide ore (probable pyrite-bearing rock) (Pyrite, FeS₂, in a quartz-rich host; exact identification is uncertain from the image) — mineral

Quartz-rich metallic sulfide ore (probable pyrite-bearing rock)

Pyrite, FeS₂, in a quartz-rich host; exact identification is uncertain from the image

Siltstone Pebble (Siltstone (composed of hydraulic-sorted silt-sized particles)) — sedimentary

Siltstone Pebble

Siltstone (composed of hydraulic-sorted silt-sized particles)

Iron Slag (Anthropogenic Vitreous Silicate (Byproduct of Smelting)) — Mineral-like byproduct

Iron Slag

Anthropogenic Vitreous Silicate (Byproduct of Smelting)

Mineral-like byproduct

Gabbro (Gabbro (mafic intrusive igneous rock)) — igneous

Gabbro

Gabbro (mafic intrusive igneous rock)

Granite (Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)) — igneous

Granite

Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Granite (Granite) — igneous

Granite

Granite

Chert (Green River Chert) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Green River Chert)

Microcrystalline Quartz (SiO2)

Milky Quartz / Rose Quartz fragment (Silicon Dioxide (SiO2)) — mineral

Milky Quartz / Rose Quartz fragment

Silicon Dioxide (SiO2)

Granite Cobble (Granite (Felsic Intrusive)) — igneous

Granite Cobble

Granite (Felsic Intrusive)