Rock Identifier

Category

Minerals

Browse minerals specimens identified by the Rock Identifier community.

Learn about Minerals in the encyclopedia

Glauconite

Hutcheonite

Halite

Sperrylite

Baddeleyite

Anatase

Brookite

Talc

Euxenite

Eltyubyuite

Buergerite

Dolomite

Quartz (Silicon dioxide (SiO2)) — mineral

Quartz

Silicon dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Jadeite (NaAlSi2O6) — mineral

Jadeite

NaAlSi2O6

Mica-rich metamorphic rock (likely schist) (Mica schist; commonly composed of muscovite and/or biotite, quartz, and feldspar) — metamorphic

Mica-rich metamorphic rock (likely schist)

Mica schist; commonly composed of muscovite and/or biotite, quartz, and feldspar

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

Milky quartz

Quartz (silicon dioxide, SiO₂)

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

Milky quartz

Quartz (silicon dioxide, SiO₂)

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

Milky quartz (rough fragment)

Quartz, silicon dioxide (SiO₂)

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

Milky quartz

Quartz, silicon dioxide (SiO₂)

Quartz (rough, iron-stained specimen) (Quartz, silicon dioxide (SiO₂)) — mineral

Quartz (rough, iron-stained specimen)

Quartz, silicon dioxide (SiO₂)

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

Milky quartz

Quartz (silicon dioxide, SiO₂)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Milky quartz vein rock (Quartz (SiO₂), likely massive vein quartz with minor iron staining) — mineral

Milky quartz vein rock

Quartz (SiO₂), likely massive vein quartz with minor iron staining

Milky quartz (Quartz (SiO₂)) — mineral

Milky quartz

Quartz (SiO₂)

Small quartz-rich rock fragment (possibly weathered quartz vein material) (Quartz (SiO₂) in an undetermined host rock; the image is insufficient to identify the host confidently) — igneous

Small quartz-rich rock fragment (possibly weathered quartz vein material)

Quartz (SiO₂) in an undetermined host rock; the image is insufficient to identify the host confidently

Smoky quartz (Quartz (SiO₂), likely smoky variety) — mineral

Smoky quartz

Quartz (SiO₂), likely smoky variety

Serpentine Sphere (Serpentinite) — metamorphic

Serpentine Sphere

Serpentinite

Quartz Crystal (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal

Silicon Dioxide (SiO2)

Halite (Sodium Chloride (NaCl)) — mineral

Halite

Sodium Chloride (NaCl)

Likely quartz-bearing rock fragment (Quartz (SiO₂), possibly with iron-oxide staining or other mineral inclusions) — mineral

Likely quartz-bearing rock fragment

Quartz (SiO₂), possibly with iron-oxide staining or other mineral inclusions

Green Quartz (Silicon Dioxide (SiO2)) — mineral

Green Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz Vein Rock (Silicon Dioxide (SiO2)) — mineral

Quartz Vein Rock

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz pebble (Silicon dioxide (SiO2)) — sedimentary

Quartz pebble

Silicon dioxide (SiO2)

Quartz Crystal Matrix (Silicon Dioxide (SiO2)) — mineral

Quartz Crystal Matrix

Silicon Dioxide (SiO2)

Rounded greenstone river cobble (Likely serpentinite or chlorite-rich metamorphic rock; exact identification requires testing) — metamorphic

Rounded greenstone river cobble

Likely serpentinite or chlorite-rich metamorphic rock; exact identification requires testing

Gneiss (Gneiss; a foliated metamorphic rock commonly composed of quartz, feldspar, and mica) — metamorphic

Gneiss

Gneiss; a foliated metamorphic rock commonly composed of quartz, feldspar, and mica

Feldspathic Gneiss (Granite Gneiss) (Gneiss (High-grade Regional Metamorphic Rock)) — metamorphic

Feldspathic Gneiss (Granite Gneiss)

Gneiss (High-grade Regional Metamorphic Rock)

Ironstone Concretion (Limonite/Goethite) (Ferruginous Sandstone or Limonite (FeO(OH)·nH2O)) — sedimentary

Ironstone Concretion (Limonite/Goethite)

Ferruginous Sandstone or Limonite (FeO(OH)·nH2O)

Iron-stained quartz-rich rock (Likely quartz-feldspar rock (granite or pegmatite) with iron-oxide staining) — igneous

Iron-stained quartz-rich rock

Likely quartz-feldspar rock (granite or pegmatite) with iron-oxide staining

Quartz-rich stone fragment (Likely quartz (SiO₂), though the image is too dim to identify confidently) — mineral

Quartz-rich stone fragment

Likely quartz (SiO₂), though the image is too dim to identify confidently

Gneiss (High-grade metamorphic rock (Gneiss)) — metamorphic

Gneiss

High-grade metamorphic rock (Gneiss)

Azurite-Malachite (Cu3(CO3)2(OH)2 and Cu2CO3(OH)2) — mineral

Azurite-Malachite

Cu3(CO3)2(OH)2 and Cu2CO3(OH)2

Actinolite (Ca2(Mg,Fe)5Si8O22(OH)2) — metamorphic

Actinolite

Ca2(Mg,Fe)5Si8O22(OH)2

Peacock Ore (Bornite (Cu5FeS4) with surface tarnish) — mineral

Peacock Ore

Bornite (Cu5FeS4) with surface tarnish

Amygdoidal Basalt (Extrusive mafic igneous rock with mineral amygdules) — igneous

Amygdoidal Basalt

Extrusive mafic igneous rock with mineral amygdules

Petrified Wood (Silicified Wood (Silicon Dioxide - SiO2)) — fossil

Petrified Wood

Silicified Wood (Silicon Dioxide - SiO2)

Bumblebee Jasper (Anhydrite-Aragonite mixture with Orpiment and Realgar) — mineraloid

Bumblebee Jasper

Anhydrite-Aragonite mixture with Orpiment and Realgar

Pegmatite with quartz, feldspar, and mica (Granitic pegmatite, chiefly quartz (SiO₂), feldspars, and mica) — igneous

Pegmatite with quartz, feldspar, and mica

Granitic pegmatite, chiefly quartz (SiO₂), feldspars, and mica