With Purple Gold and Bouncy Metal, a Canadian Chemist Shines on YouTube. Disillusioned with grad school, Nigel Braun dropped out to film chemistry videos in his parents’ garage in Montreal.

The tunneling view down Franklin Egemole’s vial is colored purple—oddly—because of gold. Egemole, a grad student in Jun-Hyun Kim’s lab at Illinois State University, made this product out ...

Part of the challenge for conservators is determining whether gold colouration is intentional. Since Roman times, artisans have created purple pigments by dissolving gold in a solvent called aqua ...

MESA, Ariz. — Laura Hardy and her husband, Jake, were shopping at a Goodwill store Saturday when something caught Jake's eye at the jewelry counter. The purple and gold medal was unmistakable ...