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

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

Obsidian

Volcanic Glass (SiO2 + impurities)

Obsidian (Obsidian (Amorphous volcanic glass)) — igneous

Obsidian

Obsidian (Amorphous volcanic glass)

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

Obsidian (Apache Tear)

Amorphous Volcanic Glass (SiO2)

Obsidian (specifically Rainbow or Silver Sheen Obsidian) (Volcanic Glass (predominantly SiO2)) — Igneous

Obsidian (specifically Rainbow or Silver Sheen Obsidian)

Volcanic Glass (predominantly SiO2)

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

Apache Tear

Obsidian (Hydrated Volcanic Glass)

Pumice (Pumice (Vesicular volcanic glass)) — igneous

Pumice

Pumice (Vesicular volcanic glass)

Obsidian (Volcanic Glass (SiO2 with impurities)) — igneous

Obsidian

Volcanic Glass (SiO2 with impurities)

Apache Tear (Obsidian) (Volcanic glass / Amorphous SiO2) — igneous

Apache Tear (Obsidian)

Volcanic glass / Amorphous SiO2

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

Mahogany Obsidian

Volcanic Glass (SiO2 + Fe2O3)

Pumice (Pumice (volcanic glass froth)) — igneous

Pumice

Pumice (volcanic glass froth)

Obsidian (Volcanic Glass (Amorphous SiO2)) — igneous

Obsidian

Volcanic Glass (Amorphous SiO2)

Pumice (Pumice (Vesicular volcanic glass)) — igneous

Pumice

Pumice (Vesicular volcanic glass)

Apache Tear (Hydrated Obsidian (Volcanic Glass)) — Igneous

Apache Tear

Hydrated Obsidian (Volcanic Glass)

Snowflake Obsidian (Volcanic Glass with Cristobalite Inclusions) — igneous

Snowflake Obsidian

Volcanic Glass with Cristobalite Inclusions

Black Obsidian (Volcanic Glass (predominantly SiO2)) — igneous

Black Obsidian

Volcanic Glass (predominantly SiO2)

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

Obsidian

Obsidian (Volcanic Glass, SiO2)

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

Apache Tear

Hydrated Obsidian (Volcanic Glass)

Obsidian (Volcanic Glass (predominantly SiO2)) — igneous

Obsidian

Volcanic Glass (predominantly SiO2)

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

Obsidian

Volcanic Glass (SiO2 + impurities)

Tumbled black stone, likely basalt or black jasper (Likely fine-grained basalt (plagioclase–pyroxene); exact identification requires testing) — igneous

Tumbled black stone, likely basalt or black jasper

Likely fine-grained basalt (plagioclase–pyroxene); exact identification requires testing

Snowflake obsidian beads (Obsidian, volcanic glass (predominantly SiO₂), with pale cristobalite/spherulitic inclusions) — igneous

Snowflake obsidian beads

Obsidian, volcanic glass (predominantly SiO₂), with pale cristobalite/spherulitic inclusions

Snowflake obsidian (Volcanic glass with cristobalite/spherulitic inclusions; composition typically rhyolitic (silica-rich).) — igneous

Snowflake obsidian

Volcanic glass with cristobalite/spherulitic inclusions; composition typically rhyolitic (silica-rich).

Polished mahogany obsidian (likely) (Volcanic glass; rhyolitic obsidian, predominantly amorphous SiO₂) — igneous

Polished mahogany obsidian (likely)

Volcanic glass; rhyolitic obsidian, predominantly amorphous SiO₂

Obsidian (Obsidian) — Igneous

Obsidian

Obsidian

Likely obsidian (Volcanic glass, predominantly silicic SiO₂) — igneous

Likely obsidian

Volcanic glass, predominantly silicic SiO₂

Pumice (Pumice (Volcanic Glass Foam)) — igneous

Pumice

Pumice (Volcanic Glass Foam)

Snowflake Obsidian (Spherulitic Volcanic Glass (SiO2 + impurities)) — igneous

Snowflake Obsidian

Spherulitic Volcanic Glass (SiO2 + impurities)

Polished black obsidian with a possible snowflake/vein inclusion (Volcanic glass; mainly rhyolitic silica glass (SiO₂), potentially with cristobalite or mineral inclusions) — igneous

Polished black obsidian with a possible snowflake/vein inclusion

Volcanic glass; mainly rhyolitic silica glass (SiO₂), potentially with cristobalite or mineral inclusions

Polished mahogany obsidian (probable) (Volcanic glass; primarily rhyolitic silica glass (SiO₂), with iron-oxide inclusions) — igneous

Polished mahogany obsidian (probable)

Volcanic glass; primarily rhyolitic silica glass (SiO₂), with iron-oxide inclusions

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

Snowflake Obsidian

Volcanic Glass (SiO2 with Cristobalite inclusions)

Pumice (Pumice; vesicular volcanic glass, typically rhyolitic to dacitic in composition) — igneous

Pumice

Pumice; vesicular volcanic glass, typically rhyolitic to dacitic in composition

Polished dark stone, likely obsidian (Volcanic glass; primarily SiO₂) — igneous

Polished dark stone, likely obsidian

Volcanic glass; primarily SiO₂

Pumice (Pumice (Silicic volcanic glass)) — igneous

Pumice

Pumice (Silicic volcanic glass)

Pumice (Pumice (volcanic glass rock)) — igneous

Pumice

Pumice (volcanic glass rock)

Obsidian (Volcanic Glass (Rich in SiO2)) — igneous

Obsidian

Volcanic Glass (Rich in SiO2)

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

Apache Tear (Obsidian)

Volcanic Glass (SiO2 + impurities)

Pumice (Pumice (volcanic glass rock)) — igneous

Pumice

Pumice (volcanic glass rock)

Obsidian (Volcanic Glass (Amorphous Silica)) — igneous

Obsidian

Volcanic Glass (Amorphous Silica)

Gold Sheen Obsidian (Volcanic Glass (SiO2 + impurities)) — igneous

Gold Sheen Obsidian

Volcanic Glass (SiO2 + impurities)

Obsidian (Volcanic Glass (Amorphous SiO2)) — igneous

Obsidian

Volcanic Glass (Amorphous SiO2)

Snowflake Obsidian (Volcanic Glass with Cristobalite inclusions) — igneous

Snowflake Obsidian

Volcanic Glass with Cristobalite inclusions

Obsidian (Volcanic Glass (Amorphous SiO2)) — igneous

Obsidian

Volcanic Glass (Amorphous SiO2)