Monaco Jewelers 33955 Doheny Park Rd, San Juan Capistrano, CA92675 Since 1990, Monaco Jewelers has been assisting customers with the purchase of fine jewelry and gemstones. Ron, the…More owner, is a certified gemologist who is also able to appraise items for insurance purposes. The shop has a large selection of diamond rings, earrings and necklaces, as well as custom designed gem pieces. There is also an on-site jewelry and watch repair service, and a "Cash 4 Gold" program, where you can have your old gold and silver jewelry appraised for purchase. The store honors trade-ins or upgrades towards the purchase of new items.