Trusted since 1985, Diamonds on Main specializes in exceptional custom design and expert fine Jewelry Repair. Diamonds are hand-selected in Antwerp, Belgium. Buyers and sellers of precious metals and gems. Located in the Valley Ridge Mall on hwy 36, Diamonds on Main originated in downtown Stillwater. Owner/Designer, JoAnn Grundhauser, is an elite member of the Independent Jewelry Org. of Master Jewelers.