The avant garde Mount Street jeweler Julie Muggenburg uses precious metals and gemstones in her beauty line. Who: Belmacz Beauty What: The London-based jeweler Julia Muggenburg, the woman behind the drop-dead-gorgeous Belmacz bijoux line, is putting her love of things that glitter and gleam into beauty products that incorporate precious metals and crushed pearls. Her Oyster Pearl Powder can be used as a highlighter on brows and cheekbones, while the Glow lip balm contains flakes of 24-karat gold leaf and comes in shades like Ruby, Scarlet, Moonstone, Magenta and Cornelian. Muggenburg’s latest beauty baby, Blitz, is a creamy eye shadow loaded with gold leaf. When and Where: Belmacz Beauty is sold at Barneys New York (although it might not have Blitz in stock yet). The line is also available at cultbeauty.co.uk, which ships worldwide. Why Bother: Sure, I’d rather have one of Muggenburg’s incredibly chic rings, necklaces or pins, but her alchemical potions are no consolation prize. How Much: Not as crazy as you’d think! Glow Gold Leaf Lip Gloss and Blitz Gold Leaf Eye Shadow are each $32, while Oyster Pearl Powder is $50.