The Hidden Alchemy: What Are the Colors to Make Blue—and Why It Matters
The first time humans intentionally crafted blue, they didn’t mix paints—they mined it. Lapis lazuli, a semiprecious stone crushed into powder, was the only reliable source of true blue for millennia. Egyptian tombs, Byzantine icons, and medieval manuscripts all bear witness to its scarcity: a single gram required grinding 100 stones. This wasn’t just pigment […]