Alexandrite is a gemstone coming into popularity because it is one color by day and another color by night. We’ll tell you how it manages this color transformation. Aalexandrite is a saucy mix of ...

When you think about gemstones, top-of-mind choices include diamonds, or even rubies, sapphires, and emeralds—the “big three” of the jewelry world. But beyond these sparkly, brilliant gems lies a more ...

Using ink made from synthetic photonic crystals and a printer that can modulate voltage, the team has figured out how to print shimmering, color-changing patterns onto a stretch of flexible opal. The ...