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

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)

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

Amethyst

SiO2 (Silicon Dioxide with Iron impurities)

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)

Citrine (Citrine (Silicon Dioxide, SiO2)) — mineral

Citrine

Citrine (Silicon Dioxide, SiO2)

Citrine Quartz (likely heat-treated) (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz (likely heat-treated)

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

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)

Milky quartz (Quartz (SiO₂), commonly called milky quartz) — mineral

Milky quartz

Quartz (SiO₂), commonly called milky quartz

Yellow Quartz (Citrine Quartz) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine Quartz)

Silicon Dioxide (SiO2)

Quartz Cobble (River Rock) (Silicon Dioxide (SiO2)) — mineral

Quartz Cobble (River Rock)

Silicon Dioxide (SiO2)

Polished magnetite-rich stone (probable magnetite or hematite) (Magnetite, Fe₃O₄; possibly hematite, Fe₂O₃) — mineral

Polished magnetite-rich stone (probable magnetite or hematite)

Magnetite, Fe₃O₄; possibly hematite, Fe₂O₃

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

Milky quartz

Quartz (silicon dioxide, SiO₂)

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

Milky quartz (likely quartz-rich rock)

Quartz, silicon dioxide (SiO₂)

Muscovite Mica (Muscovite / KAl2(AlSi3O10)(OH)2) — mineral

Muscovite Mica

Muscovite / KAl2(AlSi3O10)(OH)2

Tumbled quartz-rich pebble (Quartz (SiO₂), likely milky quartz or quartzite fragment) — mineral

Tumbled quartz-rich pebble

Quartz (SiO₂), likely milky quartz or quartzite fragment

Pyrite (Iron Sulfide (FeS2)) — mineral

Pyrite

Iron Sulfide (FeS2)

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

Citrine Quartz (Yellow Quartz)

Silicon Dioxide (SiO2) with iron impurities

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

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

Smoky Quartz

Smoky Quartz (Silicon Dioxide, SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

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

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Rainbow Moonstone (White Labradorite (formula: (Na,Ca)(Al,Si)4O8)) — mineral

Rainbow Moonstone

White Labradorite (formula: (Na,Ca)(Al,Si)4O8)

Black Tourmaline (Schorl) (Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)) — mineral

Black Tourmaline (Schorl)

Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

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

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

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

Milky Quartz Pebbles

Silicon Dioxide (SiO2)

Milky quartz with iron staining (Quartz, silicon dioxide (SiO₂)) — mineral

Milky quartz with iron staining

Quartz, silicon dioxide (SiO₂)

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

Hematite

Iron(III) oxide (Fe2O3)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Raw quartz crystal/chunk (Quartz (silicon dioxide, SiO₂)) — mineral

Raw quartz crystal/chunk

Quartz (silicon dioxide, SiO₂)

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

Milky quartz

Quartz (silicon dioxide, SiO₂)

Iron-stained quartz-rich rock, possibly weathered granite or quartzite (Uncertain from image; likely quartz (SiO₂) with feldspar and iron-oxide staining) — igneous

Iron-stained quartz-rich rock, possibly weathered granite or quartzite

Uncertain from image; likely quartz (SiO₂) with feldspar and iron-oxide staining

Rounded pinkish quartz-rich pebble (Likely quartzite or fine-grained granite/granitoid; exact identification is uncertain from the image) — igneous

Rounded pinkish quartz-rich pebble

Likely quartzite or fine-grained granite/granitoid; exact identification is uncertain from the image

Quartz-rich river pebble (likely milky quartz or quartzite) (Quartz, SiO₂; possibly quartzite, a metamorphic rock dominated by quartz) — mineral

Quartz-rich river pebble (likely milky quartz or quartzite)

Quartz, SiO₂; possibly quartzite, a metamorphic rock dominated by quartz

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

Amethyst

Amethyst (Silicon Dioxide, SiO2 with Iron impurities)

Blue Apatite (Apatite (Ca5(PO4)3(F,Cl,OH))) — mineral

Blue Apatite

Apatite (Ca5(PO4)3(F,Cl,OH))

Quartz pebble (Quartz (SiO2)) — sedimentary

Quartz pebble

Quartz (SiO2)