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

Pumice (Vesicular volcanic glass) — igneous

Pumice

Vesicular volcanic glass

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

Obsidian Jewelry Piece

Volcanic Glass (SiO2 + impurities)

Blue obsidian-like volcanic glass (Volcanic glass, chiefly silica-rich amorphous material (composition uncertain)) — igneous

Blue obsidian-like volcanic glass

Volcanic glass, chiefly silica-rich amorphous material (composition uncertain)

Obsidian (Volcanic glass (Mainly SiO2)) — igneous

Obsidian

Volcanic glass (Mainly SiO2)

Pumice (Pumice (Vesicular volcanic glass)) — igneous

Pumice

Pumice (Vesicular volcanic glass)

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Snowflake Obsidian (Spherulitic Obsidian (Amorphous Volcanic Glass with Cristobalite inclusions)) — igneous

Snowflake Obsidian

Spherulitic Obsidian (Amorphous Volcanic Glass with Cristobalite inclusions)

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Pumice (Vesicular volcanic glass) — igneous

Pumice

Vesicular volcanic glass

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

Obsidian

Volcanic Glass (SiO2 + impurities)

Vesicular volcanic rock (likely scoria) (Scoria, a vesicular basaltic to andesitic volcanic rock; exact identification is uncertain from the image) — igneous

Vesicular volcanic rock (likely scoria)

Scoria, a vesicular basaltic to andesitic volcanic rock; exact identification is uncertain from the image

Pumice (Pumice (Amorphous volcanic glass)) — igneous

Pumice

Pumice (Amorphous volcanic glass)

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Black Obsidian (Volcanic Glass (felsic)) — igneous

Black Obsidian

Volcanic Glass (felsic)

Pumice (Pumice (volcanic glass foam)) — igneous

Pumice

Pumice (volcanic glass foam)

Black Obsidian (Volcanic Glass (SiO2)) — igneous

Black Obsidian

Volcanic Glass (SiO2)

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Black obsidian (probable) (Volcanic glass; primarily SiO₂-rich rhyolitic composition) — igneous

Black obsidian (probable)

Volcanic glass; primarily SiO₂-rich rhyolitic composition

Pumice (Pumice (Amorphous volcanic glass)) — igneous

Pumice

Pumice (Amorphous volcanic glass)

Rounded porous volcanic rock (likely scoria) (Scoria, vesicular basalt) — igneous

Rounded porous volcanic rock (likely scoria)

Scoria, vesicular basalt

Pumice (Pumicite (Amorphous volcanic glass)) — Igneous

Pumice

Pumicite (Amorphous volcanic glass)

Pumice (Volcanic Glass / Pumiceous Rhyolite) — igneous

Pumice

Volcanic Glass / Pumiceous Rhyolite

Polished mahogany obsidian (likely) (Obsidian, naturally occurring volcanic glass; likely reddish-brown mahogany obsidian) — igneous

Polished mahogany obsidian (likely)

Obsidian, naturally occurring volcanic glass; likely reddish-brown mahogany obsidian

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

Black Obsidian

Volcanic Glass (SiO2 with impurities)

Snowflake Obsidian (Polished Cabochon) (Obsidian with Spherulitic Cristobalite (SiO2)) — igneous

Snowflake Obsidian (Polished Cabochon)

Obsidian with Spherulitic Cristobalite (SiO2)

Obsidian (Volcanic Glass (SiO2)) — igneous

Obsidian

Volcanic Glass (SiO2)

Possible obsidian (black volcanic glass) (Obsidian; natural silica-rich volcanic glass, composition typically rhyolitic) — igneous

Possible obsidian (black volcanic glass)

Obsidian; natural silica-rich volcanic glass, composition typically rhyolitic

Obsidian (Volcanic Glass (predominantly SiO2)) — igneous

Obsidian

Volcanic Glass (predominantly SiO2)

Pumice (Pumice (Amorphous volcanic glass)) — igneous

Pumice

Pumice (Amorphous volcanic glass)

Pumice (Pumice (Vesicular volcanic glass)) — igneous

Pumice

Pumice (Vesicular volcanic glass)

Pumice or vesicular volcanic rock (Pumice; predominantly volcanic glass (silica-rich, commonly rhyolitic to dacitic)) — igneous

Pumice or vesicular volcanic rock

Pumice; predominantly volcanic glass (silica-rich, commonly rhyolitic to dacitic)

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

Obsidian

Obsidian (Volcanic Glass, SiO2)

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

Polished black stone, likely black obsidian

Obsidian — volcanic glass, chiefly SiO₂

Black Obsidian (Volcanic Glass (SiO2)) — igneous

Black Obsidian

Volcanic Glass (SiO2)

Obsidian (Obsidian (volcanic glass)) — igneous

Obsidian

Obsidian (volcanic glass)

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Pumice (Pumice (volcanic glass)) — igneous

Pumice

Pumice (volcanic glass)

Obsidian Arrowhead (Volcanic Glass (SiO2)) — igneous

Obsidian Arrowhead

Volcanic Glass (SiO2)

Obsidian (Obsidian (Volcanic Glass)) — igneous

Obsidian

Obsidian (Volcanic Glass)

Black Obsidian (Volcanic Glass (SiO2)) — igneous

Black Obsidian

Volcanic Glass (SiO2)

Pumice (Pumice (volcanic glass)) — igneous

Pumice

Pumice (volcanic glass)