The BSA is a constituent member of the World Organization of the Scout Movement. The traditional Scouting divisions are Cub Scouting for boys ages 7 to 10Â½ years, Boy Scouting for boys ages 10Â½ to 18 and Venturing for young men and women ages 14 (or 13 and having completed the 8th grade) through 21.
Black Obsidian has been used since Paleolithic times for making tools and weapons because it holds a sharp edge. Black Obsidian Geological Description: Obsidian is a glassy, silica rich rock formed from lava with a hardness of 5 to 5.5. It is an amorphous stone meaning that its structure contains no regular geometric pattern. Obsidian is found in South America, Japan, Mexico, Afghanistan, and parts of the United States.
Refer to Igneous Rocks Photos for more visual examples of each of these igneous rock types. glassy texture 1. obsidian Obsidian is volcanic glass without gas bubbles. It is usually black or dark brown in color and breaks with a conchoidal (shell-like) fracture.Be careful not to cut yourself on the sharp edges.efer to Igneous Rocks Photos for more visual examples of each of these igneous rock types. glassy texture 1. obsidian Obsidian is volcanic glass without gas bubbles. It is usually black or dark brown in color and breaks with a conchoidal (shell-like) fracture. Be careful not to cut yourself on the sharp edges.