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

Green Aventurine (SiO2 (Silicon Dioxide with inclusions of Fuchsite mica)) — mineral

Green Aventurine

SiO2 (Silicon Dioxide with inclusions of Fuchsite mica)

Tumbled quartz pebble (Quartz, SiO₂; possibly iron-stained or included quartz) — mineral

Tumbled quartz pebble

Quartz, SiO₂; possibly iron-stained or included quartz

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

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

Yellow Quartz (Citrine Quartz)

Silicon Dioxide (SiO2)

Peach Moonstone (Potassium Aluminum Silicate (KAlSi3O8)) — mineral

Peach Moonstone

Potassium Aluminum Silicate (KAlSi3O8)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

White Quartz (Silicon Dioxide (SiO2)) — mineral

White Quartz

Silicon Dioxide (SiO2)

Blue apatite crystals (Apatite group, commonly fluorapatite (Ca₅(PO₄)₃F)) — mineral

Blue apatite crystals

Apatite group, commonly fluorapatite (Ca₅(PO₄)₃F)

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

Moonstone

Orthoclase Feldspar ((K,Na)AlSi3O8)

Rainbow Moonstone (White Labradorite) (Labradorite (White varieties with Schiller effect), (Na,Ca)(Al,Si)4O8) — gemstone

Rainbow Moonstone (White Labradorite)

Labradorite (White varieties with Schiller effect), (Na,Ca)(Al,Si)4O8

Polished brown moonstone (likely feldspar) (Orthoclase or plagioclase feldspar, approximately KAlSi₃O₈ or NaAlSi₃O₈–CaAl₂Si₂O₈) — mineral

Polished brown moonstone (likely feldspar)

Orthoclase or plagioclase feldspar, approximately KAlSi₃O₈ or NaAlSi₃O₈–CaAl₂Si₂O₈

Quartz-rich rock, likely milky quartz with iron staining (Quartz (SiO₂), possibly a quartz vein fragment) — mineral

Quartz-rich rock, likely milky quartz with iron staining

Quartz (SiO₂), possibly a quartz vein fragment

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

Hematite

Iron(III) oxide (Fe2O3)

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (specifically Citrine or Iron-stained Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (specifically Citrine or Iron-stained Quartz)

Silicon Dioxide (SiO2)

Orthoclase Feldspar (or K-Feldspar) (Orthoclase (KAlSi3O8)) — Mineral

Orthoclase Feldspar (or K-Feldspar)

Orthoclase (KAlSi3O8)

Polished smoky quartz crystal with inclusions (Quartz, silicon dioxide (SiO₂), likely smoky quartz with iron-oxide or other mineral inclusions) — mineral

Polished smoky quartz crystal with inclusions

Quartz, silicon dioxide (SiO₂), likely smoky quartz with iron-oxide or other mineral inclusions

Yellow Quartz (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz

Silicon Dioxide (SiO2)

Yellow Quartz (Citrine or Quartzite Pebble) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine or Quartzite Pebble)

Silicon Dioxide (SiO2)

Milky Quartz with Iron Inclusions (Silicon Dioxide (SiO2)) — mineral

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Peach Moonstone (Feldspar (KAlSi3O8) with inclusions) — mineral

Peach Moonstone

Feldspar (KAlSi3O8) with inclusions

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

Milky quartz crystal

Quartz, silicon dioxide (SiO₂)

Milky Quartz with Iron Inclusions (Silicon Dioxide (SiO2)) — mineral

Milky Quartz with Iron Inclusions

Silicon Dioxide (SiO2)

Green Aventurine (Carved) (Silicon Dioxide (Quartz variant) with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O(OH)2)) — mineral

Green Aventurine (Carved)

Silicon Dioxide (Quartz variant) with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O(OH)2)

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

Moonstone (Orthoclase Feldspar)

Orthoclase (KAlSi3O8) with Albite (NaAlSi3O8)

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

Clear Quartz Cluster

Silicon Dioxide (SiO2)

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

Yellow Quartz (Citrine or Yellow Jasper)

Silicon Dioxide (SiO2) with iron impurities

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

Milky quartz

Quartz (silicon dioxide, SiO₂)

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

Citrine Quartz

Silicon Dioxide (SiO2) with ferric iron impurities

Moonstone (Orthoclase and Albite (KAlSi3O8 / NaAlSi3O8)) — mineral

Moonstone

Orthoclase and Albite (KAlSi3O8 / NaAlSi3O8)

Likely milky quartz fragment (Quartz (silicon dioxide, SiO₂)) — mineral

Likely milky quartz fragment

Quartz (silicon dioxide, SiO₂)

Milky quartz (possibly pale rose quartz) (Quartz, silicon dioxide (SiO₂)) — mineral

Milky quartz (possibly pale rose quartz)

Quartz, silicon dioxide (SiO₂)

Orange Calcite (Calcium Carbonate (CaCO3)) — mineral

Orange Calcite

Calcium Carbonate (CaCO3)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Blue Quartz (Silicon Dioxide (SiO2) with inclusions) — mineral

Blue Quartz

Silicon Dioxide (SiO2) with inclusions

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Citrine (Heat-treated Amethyst) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Citrine (Heat-treated Amethyst)

Silicon Dioxide (SiO2) with iron impurities

Moonstone (specifically White Moonstone/Adularia) (Potassium aluminum silicate ((K,Na)AlSi3O8)) — mineral

Moonstone (specifically White Moonstone/Adularia)

Potassium aluminum silicate ((K,Na)AlSi3O8)

Faceted black gemstone, likely black spinel (Spinel (MgAl₂O₄); identification from the image is uncertain) — gemstone

Faceted black gemstone, likely black spinel

Spinel (MgAl₂O₄); identification from the image is uncertain

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

Smoky Quartz Pebble

Silicon Dioxide (SiO2)