Rock Identifier

Category

Mineral Equivalent

Browse mineral equivalent specimens identified by the Rock Identifier community.

Stainless Steel (Polished) (Ferrous Alloy containing Iron (Fe), Chromium (Cr), and Carbon (C)) — Mineral equivalent / Metal Alloy

Stainless Steel (Polished)

Ferrous Alloy containing Iron (Fe), Chromium (Cr), and Carbon (C)

Mineral equivalent / Metal Alloy

Schist (Kyanite Schist) (Kyanite-Mica Schist (primarily Al2SiO5, KAl2(AlSi3O10)(OH)2, and SiO2)) — metamorphic

Schist (Kyanite Schist)

Kyanite-Mica Schist (primarily Al2SiO5, KAl2(AlSi3O10)(OH)2, and SiO2)

Basalt (Basalt (Aphanitic Mafic Igneous Rock)) — igneous

Basalt

Basalt (Aphanitic Mafic Igneous Rock)

Porphyritic Rhyolite (Rhyolite (Porphyritic)) — igneous

Porphyritic Rhyolite

Rhyolite (Porphyritic)

Rhyolite (Rhyolite (Extrusive Igneous Rock)) — igneous

Rhyolite

Rhyolite (Extrusive Igneous Rock)

Gabbro (Gabbro) — igneous

Gabbro

Gabbro

Rhyolite (Rhyolite) — igneous

Rhyolite

Rhyolite

Andesite (Andesite (Intermediate Extrusive Volcanic Rock)) — igneous

Andesite

Andesite (Intermediate Extrusive Volcanic Rock)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Diabase (Greenstone) (Diabase (also known as Dolerite)) — igneous

Diabase (Greenstone)

Diabase (also known as Dolerite)

Basalt River Cobble (Vitreous aphanitic Basalt) — igneous

Basalt River Cobble

Vitreous aphanitic Basalt

Yellow Quartz (Citrine Quartz or Yellow Jasper) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Yellow Quartz (Citrine Quartz or Yellow Jasper)

Silicon Dioxide (SiO2) with iron impurities

Gabbro (Plutonic mafic rock) — igneous

Gabbro

Plutonic mafic rock

Gabbro (Gabbro (phaneritic mafic intrusive rock)) — Igneous

Gabbro

Gabbro (phaneritic mafic intrusive rock)

Diorite (Diorite (Intermediate intrusive igneous rock)) — igneous

Diorite

Diorite (Intermediate intrusive igneous rock)

Rhyolite (Rhyolite) — igneous

Rhyolite

Rhyolite

Andesite (Andesite (Intermediate Volcanic Rock)) — igneous

Andesite

Andesite (Intermediate Volcanic Rock)

Vesicular Rhyolite (Extrusive igneous rock (high-silica rhyolite)) — igneous

Vesicular Rhyolite

Extrusive igneous rock (high-silica rhyolite)

Rhyolite (Rhyolite (felsic volcanic rock)) — igneous

Rhyolite

Rhyolite (felsic volcanic rock)

Porphyritic Rhyolite (Cookie Stone) (Porphyritic Rhyolite (SiO2, with phenocrysts)) — igneous

Porphyritic Rhyolite (Cookie Stone)

Porphyritic Rhyolite (SiO2, with phenocrysts)

Gabbro (Water-Worn Cobble) (Gabbro) — igneous

Gabbro (Water-Worn Cobble)

Gabbro

Conglomerate (Conglomerate (SiO2 matrix with various silicate clasts)) — sedimentary

Conglomerate

Conglomerate (SiO2 matrix with various silicate clasts)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Basalt (Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)) — Igneous

Basalt

Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)

Gabbro (Gabbro) — igneous

Gabbro

Gabbro

Rhyolite (Rhyolite (Extrusive Igneous Rock)) — igneous

Rhyolite

Rhyolite (Extrusive Igneous Rock)

Quartzite (river pebble) and Gabbro (crushed rock) (Quartzite (metamorphosed Quartz Sandstone, SiO2) and Gabbro (Plagioclase-Clinopyroxene rock)) — Metamorphic and Igneous

Quartzite (river pebble) and Gabbro (crushed rock)

Quartzite (metamorphosed Quartz Sandstone, SiO2) and Gabbro (Plagioclase-Clinopyroxene rock)

Metamorphic and Igneous

Obsidian (Black) (Obsidian (High-silica volcanic glass)) — igneous

Obsidian (Black)

Obsidian (High-silica volcanic glass)

Porphyritic Rhyolite (Rhyolite (Porphyritic texture)) — igneous

Porphyritic Rhyolite

Rhyolite (Porphyritic texture)

Amygdaloidal Rhyolite (Rhyolite (felsic volcanic rock) with amygdules) — igneous

Amygdaloidal Rhyolite

Rhyolite (felsic volcanic rock) with amygdules

Porphyritic Rhyolite (Porphyritic Rhyolite (compositionally similar to granite)) — igneous

Porphyritic Rhyolite

Porphyritic Rhyolite (compositionally similar to granite)

Gabbro (Phaneritic Mafic Igneous Rock) — igneous

Gabbro

Phaneritic Mafic Igneous Rock

Pumice (Pumice (a highly vesicular volcanic glass)) — igneous

Pumice

Pumice (a highly vesicular volcanic glass)

Chert (containing Iron Oxide spots) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (containing Iron Oxide spots)

Microcrystalline Quartz (SiO2)

Rhyolite (Rhyolite (High-silica volcanic rock)) — igneous

Rhyolite

Rhyolite (High-silica volcanic rock)

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

Gabbro

Gabbro (mafic intrusive igneous rock)

Gabbro (Gabbro (composed mainly of calcium-rich plagioclase feldspar and pyroxene)) — igneous

Gabbro

Gabbro (composed mainly of calcium-rich plagioclase feldspar and pyroxene)

Porphyritic Rhyolite (Red) (Rhyolite (Porphyry)) — igneous

Porphyritic Rhyolite (Red)

Rhyolite (Porphyry)

Quartzite / Sandstone / Chert Mix (Silicon Dioxide (SiO2)) — sedimentary and metamorphic

Quartzite / Sandstone / Chert Mix

Silicon Dioxide (SiO2)

sedimentary and metamorphic

Rhyolite (Rhyolite) — igneous

Rhyolite

Rhyolite

Basalt (Basalt) — igneous

Basalt

Basalt

Rhyolite (Rhyolite) — igneous

Rhyolite

Rhyolite