To view all our multimeter ranges go to http://bit.ly/1EdnDeo. In this video, Josh shows us how to use a multimeter to check for faults in an electrical switch.1  Howto & Style. 2  Standard YouTube License.o view all our multimeter ranges go to http://bit.ly/1EdnDeo. In this video, Josh shows us how to use a multimeter to check for faults in an electrical switch. 1  Howto & Style. 2  Standard YouTube License.
Black is the most common color of obsidian. However, it can also be brown, tan, or green. Rarely, obsidian can be blue, red, orange, or yellow. The colors are thought to be caused mainly by trace elements or inclusions.
About the Stone. Obsidian is a volcanic glass created when lava erupts from a volcano, but only when certain conditions are met: 1  There needs to be a large amount of silica in the environment (this accounts for 70% of obsidianâs composition).2  The lava must cool rapidly, before in it has time for crystal growth.bout the Stone. Obsidian is a volcanic glass created when lava erupts from a volcano, but only when certain conditions are met: 1  There needs to be a large amount of silica in the environment (this accounts for 70% of obsidianâs composition).