Rock Identifier

Category

Volcanic Glass (Igneous)

Browse volcanic glass (igneous) specimens identified by the Rock Identifier community.

Learn about Volcanic Glass (Igneous) in the encyclopedia

Black Obsidian

Pink Obsidian

Sideromelane

Obsidian

Tachylite

Perlite

Yellow Obsidian

Yellow Obsidian

Turquoise Obsidian

Teal Obsidian

Green Sheen Obsidian

Clear Obsidian

Cobalt Blue Obsidian

Snowflake Obsidian (Hydrated Volcanic Glass (primarily SiO2) with Cristobalite inclusions) — igneous

Snowflake Obsidian

Hydrated Volcanic Glass (primarily SiO2) with Cristobalite inclusions

Golden Sheen Obsidian (Volcanic Glass (predominantly SiO2, >70%)) — igneous

Golden Sheen Obsidian

Volcanic Glass (predominantly SiO2, >70%)

Obsidian (Volcanic glass, primarily SiO₂ (noncrystalline)) — igneous

Obsidian

Volcanic glass, primarily SiO₂ (noncrystalline)

Tumbled black stone, likely black obsidian (Obsidian — volcanic glass, primarily SiO₂) — igneous

Tumbled black stone, likely black obsidian

Obsidian — volcanic glass, primarily SiO₂

Mahogany Obsidian (Volcanic Glass with Hematite/Magnetite inclusions) — igneous

Mahogany Obsidian

Volcanic Glass with Hematite/Magnetite inclusions

Polished black stone, likely black obsidian (Obsidian (volcanic glass; predominantly SiO₂)) — igneous

Polished black stone, likely black obsidian

Obsidian (volcanic glass; predominantly SiO₂)

Likely polished black stone or obsidian (Obsidian (volcanic glass), chiefly SiO₂) — igneous

Likely polished black stone or obsidian

Obsidian (volcanic glass), chiefly SiO₂

Tumbled black stone, probably black obsidian (Obsidian — volcanic glass, chiefly SiO₂) — igneous

Tumbled black stone, probably black obsidian

Obsidian — volcanic glass, chiefly SiO₂

Tumbled black stone, likely black obsidian (Obsidian (volcanic glass; predominantly SiO₂)) — igneous

Tumbled black stone, likely black obsidian

Obsidian (volcanic glass; predominantly SiO₂)

Snowflake Obsidian (Volcanic Glass with Spherulitic Cristobalite Inclusion) — igneous

Snowflake Obsidian

Volcanic Glass with Spherulitic Cristobalite Inclusion

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

Mahogany Obsidian

Volcanic Glass with Hematite (SiO2 + Fe2O3)

Obsidian (Obsidian (Volcanic glass, primarily SiO2)) — igneous

Obsidian

Obsidian (Volcanic glass, primarily SiO2)

Mahogany Obsidian (Volcanic Glass with Hematite/Magnetite inclusions) — igneous

Mahogany Obsidian

Volcanic Glass with Hematite/Magnetite inclusions

Obsidian (Obsidian (Volcanic Glass, SiO2 > 70%)) — igneous

Obsidian

Obsidian (Volcanic Glass, SiO2 > 70%)

Mahogany Obsidian (Volcanic Glass (with inclusions of Magnetite or Hematite)) — igneous

Mahogany Obsidian

Volcanic Glass (with inclusions of Magnetite or Hematite)

Black Obsidian (Obsidian (Volcanic Glass, ~70% SiO2)) — igneous

Black Obsidian

Obsidian (Volcanic Glass, ~70% SiO2)

Obsidian (Amorphous Volcanic Glass (primarily SiO2)) — igneous

Obsidian

Amorphous Volcanic Glass (primarily SiO2)

Apache Tear (Obsidian (Hydrated Volcanic Glass, SiO2)) — igneous

Apache Tear

Obsidian (Hydrated Volcanic Glass, SiO2)

Obsidian (Volcanic Glass (Amorphous Silicon Dioxide)) — igneous

Obsidian

Volcanic Glass (Amorphous Silicon Dioxide)

Obsidian with Spherulitic Devitrification (Snowflake Obsidian/Mahogany related) (Volcanic Glass (70% or more SiO2)) — igneous

Obsidian with Spherulitic Devitrification (Snowflake Obsidian/Mahogany related)

Volcanic Glass (70% or more SiO2)

Obsidian (Volcanic Glass (70% or more SiO2)) — igneous

Obsidian

Volcanic Glass (70% or more SiO2)

Pumice (Pumice (volcanic glass with vesicular texture)) — igneous

Pumice

Pumice (volcanic glass with vesicular texture)

Polished black stone, likely black obsidian (Obsidian (volcanic glass; primarily SiO₂)) — igneous

Polished black stone, likely black obsidian

Obsidian (volcanic glass; primarily SiO₂)

Obsidian (Volcanic Glass (Amorphous Silicon Dioxide)) — igneous

Obsidian

Volcanic Glass (Amorphous Silicon Dioxide)

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

Pumice

Pumice (Highly vesicular volcanic glass)

Pumice (Pumice (Volcanic Glass with Vesicular Texture)) — igneous

Pumice

Pumice (Volcanic Glass with Vesicular Texture)

Obsidian (Volcanic Glass (Primary component: SiO2)) — igneous

Obsidian

Volcanic Glass (Primary component: SiO2)

Mahogany Obsidian (Volcanic Glass (Silicate: SiO2 + Fe2O3)) — igneous

Mahogany Obsidian

Volcanic Glass (Silicate: SiO2 + Fe2O3)

Obsidian (Obsidian (Volcanic Glass, SiO2 + impurities)) — igneous

Obsidian

Obsidian (Volcanic Glass, SiO2 + impurities)

Pumice (Pumice (a highly vesicular volcanic glass)) — igneous

Pumice

Pumice (a highly vesicular volcanic glass)

Pumice (Felsic Volcanic Glass / Vesicular Rhyolite) — Igneous

Pumice

Felsic Volcanic Glass / Vesicular Rhyolite

Apache Tear (Hydrated Obsidian (Natural Volcanic Glass)) — igneous

Apache Tear

Hydrated Obsidian (Natural Volcanic Glass)

Obsidian (Volcanic Glass (comprised primarily of SiO2)) — Igneous

Obsidian

Volcanic Glass (comprised primarily of SiO2)

Pumice (Pumice (a highly vesicular volcanic glass)) — igneous

Pumice

Pumice (a highly vesicular volcanic glass)

Mahogany Obsidian Arrowhead (Obsidian (volcanic glass) with Hematite inclusions) — igneous

Mahogany Obsidian Arrowhead

Obsidian (volcanic glass) with Hematite inclusions

Obsidian (Apache Tear) (Amorphous Volcanic Glass (SiO2 + impurities)) — igneous

Obsidian (Apache Tear)

Amorphous Volcanic Glass (SiO2 + impurities)

Obsidian (Obsidian (Volcanic Glass, SiO2 + impurities)) — igneous

Obsidian

Obsidian (Volcanic Glass, SiO2 + impurities)

Obsidian (Volcanic Glass (Primary component: SiO2)) — igneous

Obsidian

Volcanic Glass (Primary component: SiO2)

Snowflake Obsidian (Volcanic glass with Spherulite inclusions (SiO2)) — igneous

Snowflake Obsidian

Volcanic glass with Spherulite inclusions (SiO2)

Obsidian / Chert (Arrowhead Artifact) (Obsidian (volcanic glass, SiO2 with impurities)) — igneous

Obsidian / Chert (Arrowhead Artifact)

Obsidian (volcanic glass, SiO2 with impurities)

Obsidian (Volcanic glass (primary composition: SiO2)) — igneous

Obsidian

Volcanic glass (primary composition: SiO2)

Pumice (Vesicular volcanic glass (primarily SiO2)) — igneous

Pumice

Vesicular volcanic glass (primarily SiO2)