Rock Identifier

Category

Igneous

Browse igneous specimens identified by the Rock Identifier community.

Learn about Igneous in the encyclopedia

Sölvsbergite

Sölvsbergite

Mint Obsidian

Mint Obsidian

Minette

Minette

Yellow-Green Obsidian

Yellow-Green Obsidian

Bostonite

Bostonite

Yellow Obsidian

Yellow Obsidian

Tinguaite

Tinguaite

Wonderstone

Wonderstone

Wehrite

Wehrite

Watermelon Obsidian

Watermelon Obsidian

Websterite

Websterite

Variolite

Variolite

Chinese Writing Stone (Porphyritic Basalt (or Andesite) with Feldspar inclusions) — igneous

Chinese Writing Stone

Porphyritic Basalt (or Andesite) with Feldspar inclusions

Pumice (Pumice (Vesicular Volcanic Glass)) — igneous

Pumice

Pumice (Vesicular Volcanic Glass)

Diamond in Kimberlite (Diamond (C in Kimberlite Matrix)) — igneous

Diamond in Kimberlite

Diamond (C in Kimberlite Matrix)

Peridotite (Peridotite (varieties include Dunite, Lherzolite, Harzburgite)) — igneous

Peridotite

Peridotite (varieties include Dunite, Lherzolite, Harzburgite)

Obsidian (Obsidian (volcanic glass), amorphous SiO2 + impurities) — igneous

Obsidian

Obsidian (volcanic glass), amorphous SiO2 + impurities

Pumice (Pumice (Amorphous volcanic glass)) — igneous

Pumice

Pumice (Amorphous volcanic glass)

Porphyritic Basalt (Amygdaloidal) (Porphyritic Mafic Volcanic Rock (Amygdaloidal Basalt)) — igneous

Porphyritic Basalt (Amygdaloidal)

Porphyritic Mafic Volcanic Rock (Amygdaloidal Basalt)

Labradorite Granite (Blue Pearl) (Anorthosite (dominated by Labradorite feldspar)) — igneous

Labradorite Granite (Blue Pearl)

Anorthosite (dominated by Labradorite feldspar)

Granite (Weathered) (Phaneritic Plutonic Rock (primarily Quartz, Feldspar, and Mica)) — igneous

Granite (Weathered)

Phaneritic Plutonic Rock (primarily Quartz, Feldspar, and Mica)

Porphyritic Basalt (Porphyritic Basalt (containing Plagioclase or Alkali Feldspar phenocrysts)) — igneous

Porphyritic Basalt

Porphyritic Basalt (containing Plagioclase or Alkali Feldspar phenocrysts)

Diorite (Phaneritic Intermediate Plutonic Rock) — Igneous

Diorite

Phaneritic Intermediate Plutonic Rock

Obsidian (Obsidian (principally SiO2)) — igneous

Obsidian

Obsidian (principally SiO2)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Pumice (Pumice (Vesicular volcanic glass)) — igneous

Pumice

Pumice (Vesicular volcanic glass)

Basalt (Basalt) — igneous

Basalt

Basalt

Amygdaloidal Rhyolite (often called Lake Superior Agate relative) (Rhyolite with Calcite/Quartz amygdules (SiO2 and secondary minerals)) — igneous

Amygdaloidal Rhyolite (often called Lake Superior Agate relative)

Rhyolite with Calcite/Quartz amygdules (SiO2 and secondary minerals)

Basalt Pebble (Basalt) — igneous

Basalt Pebble

Basalt

Gray Basalt Cobble (Basalt) — igneous

Gray Basalt Cobble

Basalt

Obsidian (Volcanic Glass (SiO2)) — igneous

Obsidian

Volcanic Glass (SiO2)

Diorite (Spotted or Dalmatian Stone pattern) (Diorite) — igneous

Diorite (Spotted or Dalmatian Stone pattern)

Diorite

Granodiorite (Granodiorite) — igneous

Granodiorite

Granodiorite

Pumice (Pumice (Highly vesicular volcanic glass)) — igneous

Pumice

Pumice (Highly vesicular volcanic glass)

Granite or Pegmatite with Mica (Granitoid) — igneous

Granite or Pegmatite with Mica

Granitoid

Mahogany Obsidian (Volcanic Glass with Hematite/Magnetite (SiO2 + Fe2O3)) — igneous

Mahogany Obsidian

Volcanic Glass with Hematite/Magnetite (SiO2 + Fe2O3)

Pumice (Pumice (Vesicular volcanic glass)) — igneous

Pumice

Pumice (Vesicular volcanic glass)

Olivine Peridotite (Peridotite (comprising Olivine (Mg,Fe)2SiO4 and Pyroxene)) — igneous

Olivine Peridotite

Peridotite (comprising Olivine (Mg,Fe)2SiO4 and Pyroxene)

Basalt (Basalt (Mafic volcanic rock)) — igneous

Basalt

Basalt (Mafic volcanic rock)

Amygdaloidal Basalt (Basalt with secondary mineral infilling (commonly Zeolite, Calcite, or Quartz)) — igneous

Amygdaloidal Basalt

Basalt with secondary mineral infilling (commonly Zeolite, Calcite, or Quartz)

Pumice (Highly vesicular volcanic glass (unnamed scientific variant: Rhyolitic/Andesitic Pumice)) — igneous

Pumice

Highly vesicular volcanic glass (unnamed scientific variant: Rhyolitic/Andesitic Pumice)

Basalt (Afanitic Mafic Basalt) — igneous

Basalt

Afanitic Mafic Basalt

Dyed Pumice (Vesicular Rhyolite (Artificial Coloration Addition)) — igneous

Dyed Pumice

Vesicular Rhyolite (Artificial Coloration Addition)

Black Obsidian (Volcanic Glass (Amorphous Silicon Dioxide, SiO2)) — igneous

Black Obsidian

Volcanic Glass (Amorphous Silicon Dioxide, SiO2)

Obsidian (Volcanic glass (mainly SiO2 with inclusions)) — igneous

Obsidian

Volcanic glass (mainly SiO2 with inclusions)

Obsidian (Volcanic Glass (70-75% SiO2)) — igneous

Obsidian

Volcanic Glass (70-75% SiO2)

Porphyry (Porphyritic Andesite/Basalt) — igneous

Porphyry

Porphyritic Andesite/Basalt

Chinese Writing Stone (Porphyritic Basalt or Porphyritic Andesite) — igneous

Chinese Writing Stone

Porphyritic Basalt or Porphyritic Andesite

Vesicular Basalt (Mafic Volcanic Rock (Basalt)) — igneous

Vesicular Basalt

Mafic Volcanic Rock (Basalt)

Granite (Granite) — igneous

Granite

Granite

Granite Cobble (Plutonic Granite) — igneous

Granite Cobble

Plutonic Granite

Basalt (Basalt) — igneous

Basalt

Basalt

Granite (Granite (Felsic Intrusive)) — igneous

Granite

Granite (Felsic Intrusive)

Granite (Phaneritic intrusive igneous rock (composed mainly of Quartz SiO2, Feldspar KAlSi3O8, and Biotite/Mica)) — igneous

Granite

Phaneritic intrusive igneous rock (composed mainly of Quartz SiO2, Feldspar KAlSi3O8, and Biotite/Mica)