Rock Identifier

Category

Igneous And Metamorphic

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

Learn about Igneous And Metamorphic in the encyclopedia

Carbonatite

Cordierite Hornfels

Cordierite Hornfels

Metabasalt

Eulysite

Migmatite

Anthracite

Metaquartzite

Slate

Marble

Hornfels

Metarhyolite

Metagabbro

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

Milky quartz (likely)

Quartz, silicon dioxide (SiO₂)

Likely magnetite (small rough crystal) (Magnetite, Fe₃O₄) — mineral

Likely magnetite (small rough crystal)

Magnetite, Fe₃O₄

Citrine (Silicon Dioxide (SiO2)) — mineral

Citrine

Silicon Dioxide (SiO2)

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

Magnetite (or Magnetic Iron Ore)

Magnetite (Fe3O4)

Quartz pebble (Silicon dioxide (SiO2)) — mineral

Quartz pebble

Silicon dioxide (SiO2)

Yellow Quartz (Citrine or Quartz Crystal with Iron Inclusions) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine or Quartz Crystal with Iron Inclusions)

Silicon Dioxide (SiO2)

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

Milky quartz

Quartz (silicon dioxide, SiO₂)

Green Calcite (Calcium Carbonate (CaCO3)) — mineral

Green Calcite

Calcium Carbonate (CaCO3)

Quartz with Iron Staining (Silicon Dioxide (SiO2) with Limonite/Hematite inclusions) — mineral

Quartz with Iron Staining

Silicon Dioxide (SiO2) with Limonite/Hematite inclusions

Moonstone (Orthoclase Feldspar ((K,Na)AlSi3O8) with Albite) — mineral

Moonstone

Orthoclase Feldspar ((K,Na)AlSi3O8) with Albite

Citrine (Silicon Dioxide (SiO2)) — mineral

Citrine

Silicon Dioxide (SiO2)

Amethyst (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst

Silicon Dioxide (SiO2) with iron impurities

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

Milky quartz

Quartz (silicon dioxide, SiO₂)

Quartz-rich rock, likely milky quartz (Quartz (SiO₂), possibly a massive quartz aggregate) — mineral

Quartz-rich rock, likely milky quartz

Quartz (SiO₂), possibly a massive quartz aggregate

Amethyst (Silicon Dioxide (SiO2) with iron impurities) — Mineral

Amethyst

Silicon Dioxide (SiO2) with iron impurities

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

Moonstone

Orthoclase (KAlSi3O8) with Albite (NaAlSi3O8) inclusions

Yellow Quartz (Citrine or Iron-Stained Quartz) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine or Iron-Stained Quartz)

Silicon Dioxide (SiO2)

Citrine (Silicon Dioxide (SiO2) with iron impurities) — mineral

Citrine

Silicon Dioxide (SiO2) with iron impurities

Iron-stained milky quartz pebble (Quartz (SiO₂), commonly with iron-oxide staining) — mineral

Iron-stained milky quartz pebble

Quartz (SiO₂), commonly with iron-oxide staining

Likely quartz-rich rock (milky quartz vein material) (Quartz, SiO₂; identification is provisional from the photo) — mineral

Likely quartz-rich rock (milky quartz vein material)

Quartz, SiO₂; identification is provisional from the photo

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Green Quartz (Prasiolite or Aventurine) (Silicon Dioxide (SiO2)) — mineral

Green Quartz (Prasiolite or Aventurine)

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Mottled quartz pebble (Quartz (SiO₂), likely iron-oxide-stained milky quartz) — mineral

Mottled quartz pebble

Quartz (SiO₂), likely iron-oxide-stained milky quartz

Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)

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

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

Citrine (Silicon Dioxide (SiO2)) — mineral

Citrine

Silicon Dioxide (SiO2)

Hematite (Iron(III) oxide (Fe2O3)) — mineral

Hematite

Iron(III) oxide (Fe2O3)

Epidote (Epidote {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)) — mineral

Epidote

Epidote {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)

Likely clear quartz fragment (Quartz (SiO₂)) — mineral

Likely clear quartz fragment

Quartz (SiO₂)

Likely quartz-rich rock (possibly milky quartz or quartz-bearing vein rock) (Quartz, SiO₂; exact identification is uncertain from the image) — mineral

Likely quartz-rich rock (possibly milky quartz or quartz-bearing vein rock)

Quartz, SiO₂; exact identification is uncertain from the image

White quartz-rich rock, possibly milky quartz (Quartz (SiO₂), likely massive milky quartz; identification is uncertain from the image) — mineral

White quartz-rich rock, possibly milky quartz

Quartz (SiO₂), likely massive milky quartz; identification is uncertain from the image

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

Milky quartz (probable)

Quartz, silicon dioxide (SiO₂)

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

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2) with natural radiation treatment) — mineral

Smoky Quartz

Silicon Dioxide (SiO2) with natural radiation treatment

Smoky Quartz (Silicon dioxide (SiO2)) — mineral

Smoky Quartz

Silicon dioxide (SiO2)

Gold Nugget / Placer Gold (Native Gold (Au)) — mineral

Gold Nugget / Placer Gold

Native Gold (Au)

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

Milky quartz (rough quartz crystal)

Quartz, silicon dioxide (SiO₂)

Citrine (Heat-Treated Amethyst) (Silicon Dioxide (SiO2)) — mineral

Citrine (Heat-Treated Amethyst)

Silicon Dioxide (SiO2)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)