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

Emerald (Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)) — mineral

Emerald

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

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

Basalt

Basalt (Mafic Extrusive Igneous Rock)

Tektite (Indochinite) (Tektite (Lechatelierite-rich silica glass)) — Mineral-like (Natural Glass)

Tektite (Indochinite)

Tektite (Lechatelierite-rich silica glass)

Mineral-like (Natural Glass)

Iron-stained quartzite pebble (Quartzite, composed predominantly of quartz (SiO₂) with iron-oxide staining) — metamorphic

Iron-stained quartzite pebble

Quartzite, composed predominantly of quartz (SiO₂) with iron-oxide staining

White quartz pebble (Quartz (silicon dioxide, SiO₂)) — mineral

White quartz pebble

Quartz (silicon dioxide, SiO₂)

Light-colored rounded pebble, likely quartzite (Quartzite, composed predominantly of recrystallized quartz (SiO₂)) — metamorphic

Light-colored rounded pebble, likely quartzite

Quartzite, composed predominantly of recrystallized quartz (SiO₂)

Polished hematite (possibly specular hematite) (Hematite, α‑Fe₂O₃) — mineral

Polished hematite (possibly specular hematite)

Hematite, α‑Fe₂O₃

Possible granite or granitic gneiss pebble (Granite; primarily quartz, feldspar, and mica) — igneous

Possible granite or granitic gneiss pebble

Granite; primarily quartz, feldspar, and mica

Milky quartz fragment (Quartz (silicon dioxide, SiO₂)) — mineral

Milky quartz fragment

Quartz (silicon dioxide, SiO₂)

Possible ironstone concretion (Iron-oxide-rich concretion, likely hematite/goethite; exact identification is uncertain from the photo) — sedimentary

Possible ironstone concretion

Iron-oxide-rich concretion, likely hematite/goethite; exact identification is uncertain from the photo

Weathered basalt pebble (Basalt; fine-grained mafic volcanic rock, chiefly plagioclase and pyroxene with possible olivine) — igneous

Weathered basalt pebble

Basalt; fine-grained mafic volcanic rock, chiefly plagioclase and pyroxene with possible olivine

Granite (Granite; chiefly quartz (SiO₂), feldspar, and mica (biotite/muscovite)) — igneous

Granite

Granite; chiefly quartz (SiO₂), feldspar, and mica (biotite/muscovite)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Charnockite (Orthopyroxene-bearing granite (Charnockite)) — metamorphic

Charnockite

Orthopyroxene-bearing granite (Charnockite)

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2) — mineral

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2

Rainbow Moonstone (White Labradorite) (White Labradorite (Feldspar variety, (Na,Ca)(Al,Si)4O8)) — mineral

Rainbow Moonstone (White Labradorite)

White Labradorite (Feldspar variety, (Na,Ca)(Al,Si)4O8)

Sodalite (Sodalite (Na8(Al6Si6O24)Cl2)) — mineral

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Fossilized Shark Tooth (Partial) (Elasmobranchii (fossil tooth fragment)) — sedimentary

Fossilized Shark Tooth (Partial)

Elasmobranchii (fossil tooth fragment)

Petrified Wood (Silicified Wood (primarily Quartz or Chalcedony, SiO2)) — mineral

Petrified Wood

Silicified Wood (primarily Quartz or Chalcedony, SiO2)

Tumbled tan pebble (Likely quartz-rich sandstone or chert; exact identification requires testing) — sedimentary

Tumbled tan pebble

Likely quartz-rich sandstone or chert; exact identification requires testing

Tumbled quartz-rich pebble (Microcrystalline quartz/chalcedony, SiO₂ (tentative)) — mineral

Tumbled quartz-rich pebble

Microcrystalline quartz/chalcedony, SiO₂ (tentative)

Rounded limestone pebble (Micritic limestone, primarily calcite (CaCO₃)) — sedimentary

Rounded limestone pebble

Micritic limestone, primarily calcite (CaCO₃)

Chert (Arrowhead Debitage or Spall) (Silicon Dioxide (SiO₂)) — sedimentary

Chert (Arrowhead Debitage or Spall)

Silicon Dioxide (SiO₂)

Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

Yellow Quartzite Pebble (Quartzite (primarily Silicon Dioxide, SiO2)) — metamorphic

Yellow Quartzite Pebble

Quartzite (primarily Silicon Dioxide, SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Red Granite (Granite) — igneous

Red Granite

Granite

Pink Granite (Crystalline Granite) (Igneous Intrusive Rock (Felsic Plutonic)) — igneous

Pink Granite (Crystalline Granite)

Igneous Intrusive Rock (Felsic Plutonic)

Basalt Pebble (Basalt (Extrusive Mafic Igneous)) — igneous

Basalt Pebble

Basalt (Extrusive Mafic Igneous)

Tumbled carnelian (Carnelian, a red-orange variety of cryptocrystalline chalcedony (SiO₂)) — gemstone

Tumbled carnelian

Carnelian, a red-orange variety of cryptocrystalline chalcedony (SiO₂)

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

Granite

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

Tektite (Indochinite) (Tektite (Natural Glass, SiO2 + Al2O3)) — mineral

Tektite (Indochinite)

Tektite (Natural Glass, SiO2 + Al2O3)

Tektite (Indochinite) (Tektite (natural glass, SiO2 + Al2O3)) — mineral

Tektite (Indochinite)

Tektite (natural glass, SiO2 + Al2O3)

Weathered sandstone pebble (Quartz-rich sandstone, predominantly SiO₂ grains cemented by silica, iron oxides, or carbonate) — sedimentary

Weathered sandstone pebble

Quartz-rich sandstone, predominantly SiO₂ grains cemented by silica, iron oxides, or carbonate

Fossil sea urchin (likely regular echinoid) (Echinoid test; likely a fossilized sea urchin, class Echinoidea) — fossil

Fossil sea urchin (likely regular echinoid)

Echinoid test; likely a fossilized sea urchin, class Echinoidea

Granite (Granite) — igneous

Granite

Granite

Glauconitic Siltstone / Mudstone (Glauconitic Pelite) — sedimentary

Glauconitic Siltstone / Mudstone

Glauconitic Pelite

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

Yellow Chalcedony (Agate)

Silicon Dioxide (SiO2)

Weathered sandstone pebble (Sandstone, chiefly quartz (SiO₂) with feldspar and iron-oxide cement) — sedimentary

Weathered sandstone pebble

Sandstone, chiefly quartz (SiO₂) with feldspar and iron-oxide cement

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

Basalt (Road Aggregate)

Basalt (Aphanitic Mafic Igneous Rock)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Pumice (Vesicular volcanic glass) — igneous

Pumice

Vesicular volcanic glass