#sehar

The Stone That Makes Blades Sharper Than Steel 🔪✨ This isn’t just any rock—it’s obsidian, a volcanic glass that humans have used for thousands of years to make some of the sharpest blades ever known. An obsidian blade is said to be so sharp it can even slice through a single cell membrane. But there’s a catch—crafting one takes #Obsidian #SharpestBlade #AncientTools #VolcanicGlass #ScienceFacts #HistoryUncovered #ObsidianBlade #Archaeology #Craftsmanship