Obsidian

Obsidian

Obsidian is a black, extrusive igneous rock. It is often called volcanic glass due to its absent crystals and glassy appearance. Major minerals include feldspar, quartz and mica. This natural rock comes in a cotton specimen collection bag with an information card including details on the rock formation, characteristics and uses.  Specimen size ranges from 1-2 inches.

For age 4+ with adult supervision.

Warning: Choking Hazard - Small Parts
Not for children under 3