Spider Web Obsidian is the name given to a type of Obsidian, an amorphous volcanic rock, ...

Snowflake Obsidian is a silica-rich volcanic glass, black based with distinctive white ...

Silver Sheen Obsidian is a form of glassy silica-rich volcanic rock. It is ...

Rainbow Obsidian is a form of Obsidian, a glassy silica-rich volcanic rock. The ...

Mahogany Obsidian is a silica-rich volcanic rock containing undulating or spotty areas ...

Gold Sheen Obsidian is a glassy silica-rich volcanic rock. It is characteristically a ...

Blue Obsidian is a soft pale blue type of Obsidian, a silica-rich volcanic rock, glassy ...

Black Obsidian is a silica-rich volcanic rock that can contain various mineral deposits. ...

Apache Tears Obsidian is a variety of Obsidian, a silica-rich glassy volcanic rock, ...

Obsidian is the name given to a silica-rich volcanic rock, glassy in appearance ...