Is Obsidian sharper than diamond?

Surprisingly, the edge of a piece of obsidian is superior to that of a surgeons steel scalpel. It is 3 times sharper than diamond and between 500-1000 times sharper than a razor or a surgeons steel blade resulting in easier incisions and fewer microscopic ragged tissue cuts. Obsidian is found all over the world.

Whats tougher than a diamond?

Moissanite, a naturally occurring silicon-carbide, is almost as hard as diamond. It is a rare mineral, discovered by the French chemist Henri Moissan in 1893 while examining rock samples from a meteor crater located in Canyon Diablo, Arizona. Hexagonal boron-nitride is 18% harder than diamond.