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 $89, you get a pair of Tacori IV nickel-free sterling-silver earrings, available exclusively at Kassab Jewelers' Portland, Tigard, and Lake Oswego locations (a $178 value).

The retailers at Kassab Jewelers shepherd earlobes to aesthetic excellence with an extensive selection of brand-name jewelry from more than 25 designers. A pair of Tacori IV Kassab sterling-silver earrings sports rhodium plating and simulated diamonds equivalent to 4.06 carats, yielding enough sparkles to temporarily blind a herd of encroaching rhinos. Tacori's signature crescent detail houses the diamonds martini-style, creating an elegant arrangement that can complete formal getups. Instead of the pair of Tacori IV nickel-free sterling-silver earrings, the value of this Groupon may also be applied to any in-store merchandise, including other Tacori pieces exclusive to Kassab Jewelers. The shop's downtown venue hosts a historic clock outside that marks the jeweler's location and helps patrons keep track of the lifetime warranty they receive on diamonds.