Jewelry can make an outfit sparkle, though only exposure to dangerous amounts of radiation can make it truly glow. Stay safe while looking sharp with today's Groupon: for $49, you get $200 worth of designer jewelry from SweepStreet.

The bauble buffs at SweepStreet stock their virtual shelves with a rotating stock of name-brand jewelry from designers such as David Yurman, Judith Ripka, and John Hardy. Every piece is discounted at 40%–60% off the retail price, and new items are added to the mix every day. From Adami & Martucci, a rhodium-plated sterling-silver ring ($45) wraps one lucky finger in an intricate design as the silver o-shaped pendant ($55.50) dangles demurely from necks. A Lagos domed ring ($150) accents a taste for fine foods with adornments of sterling silver caviar beads, and stud earrings ($143) boast rectangular prisms of 18-karat gold citrine. Judith Ripka's delicate pave heart sapphire pendant ($210) phases out unwieldy artificial hearts with an array of white sapphires, which beautifully compliment a pair of ottoman hoop earrings ($120).