School of Rock

In their fall collections, designers like Gucci, Marc Jacobs and Donna Karan embraced a rainbow of sapphires, rubies and amethysts paired with silver and gold. But they’re not the only ones taking inspiration from the jewellery boutique. Gems and precious metals—which have a long history of healing in traditional medicine—are finding their way into our beauty regimens too: skin-care companies are harnessing their benefits to repair and revitalize our skin.