Snowflake Obsidian Marple Sphere
Snowflake obsidian marble sphere.
Diameter: 3/4 of an inch
Obsidian, a dark volcanic glass, has a smooth, glossy appearance. Snowflake obsidian is a type of black obsidian with white or grayish spots. These spots are called spherulites, and they are composed of needle-shaped cristobalite, a type of quartz.