Beneath a royal-purple awning, gems such as diamonds, amethysts and citrines glitter from earrings and necklaces or rings wrought from silver and gold. JEM Jewellers’ trio of designers––including gemologist and owner Jan Marten––crafts custom jewelry and help clients personalize design-your-own mothers’ necklaces with gemstones to symbolize the birth months of children, grandchildren, and favorite news anchors. Pieces from brands such as Encore and Posh Mommy, as well as Indianapolis Colts–themed jewelry, round out Jan and company's sparkling collection. Marten and her team also repair faulty watch cogs and snapped jewelry clasps and appraise new and vintage baubles with expertise honed for more than 30 years in business.