Obsidian: A Guide to its Uses & Properties" "It is known as the 'black diamond' for its resemblance to natural diamonds, although it has a hardness of only 5.5-6 on the Mohs scale compared to diamond's 10. It exhibits beautiful iridescent colors when polished and is often used in jewelry making, particularly in rings and pendants due to its durability despite its relatively low hardness." "Obsidian is also found to have many metaphysical properties. It is believed to enhance intuition, protect against negative energies, and promote personal strength and clarity.
