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
For age 4+ with adult supervision.
Warning: Choking Hazard - Small Parts
Not for children under 3
Related products
