MOHS Hardness Scale
Atomic diffusion and crystal formation are both impossible in obsidian stones due to their extreme viscosity and polymerization. The obsidian stone has a MOHS of 6 and is extremely fragile. As a result, it’s not unusual to come across it with cracks or sharp edges. In fact, obsidian has historically been used as a cutting and piercing tool, was fashioned into arrowheads and blades during the Stone Age, and has recently been used experimentally for surgical scalpels. In fact, obsidian, also known as Dragon Glass, plays an important role in Game of Thrones.
Argentina, Armenia, Australia, Chile, Greece, El Salvador, Guatemala, Iceland, Italy, Kenya, New Zealand, Peru, Scotland, and the United States are among the countries where obsidian has been discovered.