Mineral - Snowflake Obsidian

Name Snowflake Obsidian
Class Volcanic rocks
Category Volcanic glass
Crystal system Amorphous
Chemical composition Silicon dioxide (SiO₂) with cristobalite inclusions forming the "flakes"
Hardness (Mohs scale) 5 to 5.5
Transparency Opaque
Geographical origin United States (Utah, Oregon), Mexico, Iceland, Turkey, Armenia