Rock Identifier

Category

Igneous Or Metamorphic

Browse igneous or metamorphic specimens identified by the Rock Identifier community.

Learn about Igneous Or Metamorphic in the encyclopedia

Carbonatite

Cordierite Hornfels

Cordierite Hornfels

Metabasalt

Eulysite

Migmatite

Anthracite

Metaquartzite

Slate

Marble

Hornfels

Metarhyolite

Metagabbro

Citrine (Silicon Dioxide (SiO2)) — mineral

Citrine

Silicon Dioxide (SiO2)

White Calcite (Calcium Carbonate (CaCO3)) — mineral

White Calcite

Calcium Carbonate (CaCO3)

Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO₂)) — mineral

Smoky Quartz

Silicon Dioxide (SiO₂)

Cloudy Quartz / Quartz Tumble (Silicon Dioxide (SiO2)) — mineral

Cloudy Quartz / Quartz Tumble

Silicon Dioxide (SiO2)

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

White Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Moonstone (Orthoclase Feldspar) (Orthoclase (KAlSi3O8) with Albite (NaAlSi3O8)) — mineral

Moonstone (Orthoclase Feldspar)

Orthoclase (KAlSi3O8) with Albite (NaAlSi3O8)

Quartz / Quartz Cluster (Silicon Dioxide (SiO2)) — mineral

Quartz / Quartz Cluster

Silicon Dioxide (SiO2)

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

Milky quartz cluster

Quartz (silicon dioxide, SiO₂)

Pyrite-bearing quartz vein fragment (Quartz (SiO₂) with pyrite (FeS₂), possibly minor chalcopyrite) — mineral

Pyrite-bearing quartz vein fragment

Quartz (SiO₂) with pyrite (FeS₂), possibly minor chalcopyrite

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)

Quartz (with Iron staining) (Silicon Dioxide (SiO2)) — mineral

Quartz (with Iron staining)

Silicon Dioxide (SiO2)

Quartz (Quartz (SiO₂)) — Mineral

Quartz

Quartz (SiO₂)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Likely quartz-bearing rock fragment (Quartz (SiO₂), possibly in a weathered granitoid or metamorphic matrix) — mineral

Likely quartz-bearing rock fragment

Quartz (SiO₂), possibly in a weathered granitoid or metamorphic matrix

Small quartz-rich rock fragment (Likely quartz-bearing granite, pegmatite, or quartzite; exact identification is uncertain from the photograph) — mineral

Small quartz-rich rock fragment

Likely quartz-bearing granite, pegmatite, or quartzite; exact identification is uncertain from the photograph

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

Milky quartz (rough quartz fragment)

Quartz, silicon dioxide (SiO₂)

Rounded quartz-rich pebble (Quartz (SiO₂), possibly milky quartz or quartzite) — mineral

Rounded quartz-rich pebble

Quartz (SiO₂), possibly milky quartz or quartzite

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

White quartz pebble (probable)

Quartz, silicon dioxide (SiO₂)

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

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Tumbled milky quartz (Quartz (silicon dioxide, SiO₂), commonly called white or milky quartz) — mineral

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂), commonly called white or milky quartz

Dark blue polished stone pendant (Indeterminate; possibly sodalite, lapis lazuli, or blue slag/glass-like material) — gemstone

Dark blue polished stone pendant

Indeterminate; possibly sodalite, lapis lazuli, or blue slag/glass-like material

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

White quartz pebble

Quartz, silicon dioxide (SiO₂), likely milky quartz

Tumbled blue-gray mineral specimen (Indeterminate; possibly dumortierite quartz, sodalite, or dyed stone) — mineral

Tumbled blue-gray mineral specimen

Indeterminate; possibly dumortierite quartz, sodalite, or dyed stone

Amethyst (Polished/Carved Crystal) (Silicon Dioxide (SiO2) with trace Iron (Fe)) — mineral

Amethyst (Polished/Carved Crystal)

Silicon Dioxide (SiO2) with trace Iron (Fe)

Weathered quartz-rich pebble (Milky quartz, chiefly silicon dioxide (SiO₂), possibly with iron-oxide staining and minor feldspar) — mineral

Weathered quartz-rich pebble

Milky quartz, chiefly silicon dioxide (SiO₂), possibly with iron-oxide staining and minor feldspar

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

Smoky Quartz

Smoky Quartz (Silicon Dioxide, SiO2)

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

Milky quartz

Quartz (silicon dioxide, SiO₂)

Magnetite (or Magnetic Iron Ore) (Magnetite (Fe3O4)) — mineral

Magnetite (or Magnetic Iron Ore)

Magnetite (Fe3O4)

River Pebble (Quartz-rich) (Silicon Dioxide (SiO2) with impurities) — sedimentary

River Pebble (Quartz-rich)

Silicon Dioxide (SiO2) with impurities

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)

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

Milky quartz

Quartz, silicon dioxide (SiO₂)

Quartz crystal fragment (Quartz (silicon dioxide, SiO₂)) — mineral

Quartz crystal fragment

Quartz (silicon dioxide, SiO₂)

Rounded white pebble, likely quartz or feldspar (Most consistent with milky quartz (SiO₂), though altered feldspar or calcite is possible from the image) — mineral

Rounded white pebble, likely quartz or feldspar

Most consistent with milky quartz (SiO₂), though altered feldspar or calcite is possible from the image

Polished blue banded stone, likely sodalite or blue apatite (Probable sodalite, Na₈(Al₆Si₆O₂₄)Cl₂; possibly blue apatite, Ca₅(PO₄)₃(F,Cl,OH)) — mineral

Polished blue banded stone, likely sodalite or blue apatite

Probable sodalite, Na₈(Al₆Si₆O₂₄)Cl₂; possibly blue apatite, Ca₅(PO₄)₃(F,Cl,OH)

Amethyst (Faceted) (Silicon Dioxide with Iron impurities (SiO2)) — mineral

Amethyst (Faceted)

Silicon Dioxide with Iron impurities (SiO2)

Quartz crystal (likely milky or cloudy quartz) (Quartz, silicon dioxide (SiO₂)) — mineral

Quartz crystal (likely milky or cloudy quartz)

Quartz, silicon dioxide (SiO₂)

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

Milky quartz (rough quartz fragment)

Quartz, silicon dioxide (SiO₂)