1lb Obsidian Tumbled Stones
Obsidian is a stone which is formed from molten lava. In other words Obsidian is an igneous rock formed out of a volcano. Its black in color and has a lustrous appearance. Its made up of silica dioxide, with impurities such as titanium dioxide, aluminum and iron oxides. As the magma runs down from the volcano, it solidifies before crystallization and hence has a glassy appearance. Its also found in the crystal form as natural glass and was one of the first stones in the history of mankind to be used for weapons like knives and arrowheads. There are different kinds of Obsidian stones like the snow flake and the rain bow Obsidian.