Size 50mm x 40mm x 22mm Weight 55g
Obsidian is the result of volcanic lava coming in contact with water. Often the lava pours into a lake or ocean and is cooled quickly. This process produces a glassy texture in the resulting rock. Iron and magnesium give the obsidian a dark green, brown, blue or black colour. Obsidian has been used by ancient people as a cutting tool, for weapons, and for ceremonial purposes and is sometimes found by archaeologists in excavations.
Obsidian has several varieties. Obsidian can contain small bubbles of air that are aligned along layers created as the molten rock was flowing just before being cooled. These bubbles can produce interesting effects such as a golden sheen, known as Gold Sheen Obsidian or a rainbow sheen called Rainbow Obsidian. Obsidian with a high iron content turns the stone a reddish brown and is known as Mahogany Obsidian.