Dragonglass obsidian
Commercial name for weathered nodules of obsidian, from the island of Milos, Greece. Dragonglass obsidian is a recently described type of obsidian discovered by Ismini…
Tag: volcanic glass
Snowflake obsidian
Commercial name for a natural black volcanic glass with white “snowflake” crystal patterns of the mineral cristobalite, created by partial crystallization (devitrification) of the glass.…
Rainbow obsidian
Commercial name for natural black volcanic glass with multicolored iridescence caused by inclusions of nanoparticles of the mineral hedenbergite. Rainbow obsidian is often cut such…
Mahogany obsidian
Commercial name for natural brown-black mottled volcanic glass. Named for its mahogany color. Although obsidian is often referred to as a gem or mineral, it…
Colombianite
Commercial name for rounded stones of weathered obsidian found in Colombia, mainly in the Valle del Cauca region around the Cali Crater. These black glassy…
Apache tear
Local name for spherical obsidian, usually embedded in gray perlite, mainly from Arizona, United States. The spheres of black-gray translucent obsidian occur as cores in…
Andara™ ‘crystals’/obsidian
This is perhaps one of the biggest and most persistent hoax stories today. Often referred to by sellers as natural volcanic glass, sometimes with the…
Live session #14 Volcanic Glass
Recorded live session in which I discuss and show a variety of different forms of volcanic glass. Volcanic glass occurs in nature in various forms,…
