Rock Identifier

Category

Mineral (Processed Alloy)

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

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Granite (Phaneritic plutonic rock (Quartz, Feldspar, Mica)) — igneous

Granite

Phaneritic plutonic rock (Quartz, Feldspar, Mica)

Green Aventurine (Silicon Dioxide (SiO2) with Fuchsite inclusions) — metamorphic

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Green Aventurine (Silicon Dioxide (SiO2) with Fuchsite inclusions) — mineral

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Pegmatite (with smoky quartz and tourmaline/biotite) (Pegmatitic Granite) — igneous

Pegmatite (with smoky quartz and tourmaline/biotite)

Pegmatitic Granite

Petrified Wood (Silicified wood (Quartz replacement, SiO2)) — fossil

Petrified Wood

Silicified wood (Quartz replacement, SiO2)

Milky Quartz with Mica Matrix (SiO2 (Silicon Dioxide) with Muscovite/Biotite mica) — mineral

Milky Quartz with Mica Matrix

SiO2 (Silicon Dioxide) with Muscovite/Biotite mica

Quartz with Mica and Feldspar (Granitic Pegmatite Fragment (SiO2 + KAlSi3O8 + KAl2(AlSi3O10)(OH)2)) — igneous

Quartz with Mica and Feldspar

Granitic Pegmatite Fragment (SiO2 + KAlSi3O8 + KAl2(AlSi3O10)(OH)2)

Aventurine Quartz (Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)) — mineral

Aventurine Quartz

Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Green Aventurine (Silicon dioxide (SiO2) with inclusions of Fuchsite) — mineral

Green Aventurine

Silicon dioxide (SiO2) with inclusions of Fuchsite

Garden Quartz (Included Quartz (SiO2 with accessory minerals such as Chlorite, Hematite, or Feldspar)) — mineral

Garden Quartz

Included Quartz (SiO2 with accessory minerals such as Chlorite, Hematite, or Feldspar)

Granite (Granite (Phaneritic igneous rock)) — igneous

Granite

Granite (Phaneritic igneous rock)

Weathered quartz-rich pebble (likely milky quartz or quartzite) (Quartz, silicon dioxide (SiO₂); possibly quartzite, a metamorphic quartz rock) — mineral

Weathered quartz-rich pebble (likely milky quartz or quartzite)

Quartz, silicon dioxide (SiO₂); possibly quartzite, a metamorphic quartz rock

Mica (Muscovite or Biotite) (Sheet silicate mineral group (e.g., KAl2(AlSi3O10)(F,OH)2)) — mineral

Mica (Muscovite or Biotite)

Sheet silicate mineral group (e.g., KAl2(AlSi3O10)(F,OH)2)

Garnet Schist (Almandine Garnet in Mica Schist (Fe3Al2(SiO4)3)) — metamorphic

Garnet Schist

Almandine Garnet in Mica Schist (Fe3Al2(SiO4)3)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz pebble (Silicon Dioxide (SiO2)) — mineral

Quartz pebble

Silicon Dioxide (SiO2)

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

Quartz Pebble

Crystalline Silicon Dioxide (SiO2)

Schist (Mica Schist (Metamorphic rock)) — metamorphic

Schist

Mica Schist (Metamorphic rock)

Quartz-rich rock, likely milky quartz vein material (Quartz (SiO₂), possibly iron-stained massive quartz with minor feldspar or mica) — mineral

Quartz-rich rock, likely milky quartz vein material

Quartz (SiO₂), possibly iron-stained massive quartz with minor feldspar or mica

Pegmatite or Graphic Granite (Intrusive Igneous Rock) — igneous

Pegmatite or Graphic Granite

Intrusive Igneous Rock

Porphyry (specifically Porphyritic Basalt or Andesite) (Porphyritic extrusive igneous rock (Mg,Fe)2SiO4 (Olivine inclusions/Plagioclase Feldspar)) — igneous

Porphyry (specifically Porphyritic Basalt or Andesite)

Porphyritic extrusive igneous rock (Mg,Fe)2SiO4 (Olivine inclusions/Plagioclase Feldspar)

Pegmatite (Feldspar and Quartz) (Pegmatite (KAlSi3O8 / SiO2)) — igneous

Pegmatite (Feldspar and Quartz)

Pegmatite (KAlSi3O8 / SiO2)

Sunstone (Plagioclase Feldspar (Na,Ca)(Si,Al)3O8) — mineral

Sunstone

Plagioclase Feldspar (Na,Ca)(Si,Al)3O8

Fossilized Bivalve Shell (Class Bivalvia (fossilized)) — fossil

Fossilized Bivalve Shell

Class Bivalvia (fossilized)

Granitic Pegmatite with Tourmaline (Granite (Feldspar/Quartz matrix) with Schorl (NaFe2+3Al6Si6O18(BO3)3(OH)3OH)) — igneous

Granitic Pegmatite with Tourmaline

Granite (Feldspar/Quartz matrix) with Schorl (NaFe2+3Al6Si6O18(BO3)3(OH)3OH)

Coarse-grained Granite (Phaneritic Granite (contains Quartz, Feldspar, and Mica)) — igneous

Coarse-grained Granite

Phaneritic Granite (contains Quartz, Feldspar, and Mica)

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

Green Aventurine

SiO2 (Quartz with Fuchsite inclusions)

Pink Granite (Potassium Feldspar-Rich Granite) — igneous

Pink Granite

Potassium Feldspar-Rich Granite

Milky quartz vein rock (Quartz, silicon dioxide (SiO₂), likely with iron-oxide staining and minor mica or sulfide minerals) — mineral

Milky quartz vein rock

Quartz, silicon dioxide (SiO₂), likely with iron-oxide staining and minor mica or sulfide minerals

Quartz with Mica (SiO2 (Quartz) with Potassium aluminum silicate (Muscovite)) — Mineral

Quartz with Mica

SiO2 (Quartz) with Potassium aluminum silicate (Muscovite)

Chert (variations include Flint/Jasper) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (variations include Flint/Jasper)

Cryptocrystalline Quartz (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Schist (Mica schist, likely muscovite–biotite schist with quartz and feldspar) — metamorphic

Schist

Mica schist, likely muscovite–biotite schist with quartz and feldspar

Quartz Pebble (Quartz (Silicon Dioxide, SiO2)) — sedimentary

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Magnetite-rich Basalt (Basalt containing Fe3O4) — igneous

Magnetite-rich Basalt

Basalt containing Fe3O4

Basalt with Plagioclase Phenocrysts (Porphyritic Basalt) — igneous

Basalt with Plagioclase Phenocrysts

Porphyritic Basalt

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Chert (often called Flint) (Microcrystalline or cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Chert (Jasper/Flint variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Flint variety)

Microcrystalline Quartz (SiO2)

Chert (variations include Flint or Jasper) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (variations include Flint or Jasper)

Microcrystalline or Cryptocrystalline Quartz (SiO2)