Established in 1980, Chula Vista Jewelry Exchange on Third Avenue buys and sells fine jewelry, watches, diamonds, coins, and precious metals from Suite 103 at 255 Third Avenue. The exchange handles engagement-ring and wedding-band sales alongside watch purchases, a bridal-jewelry pipeline that complements the tuxedo fittings at Friar Tux on the formal-wear side of wedding preparation. Coin grading submissions, jewelry appraisals, and watch battery replacements round out a service menu that draws both sellers liquidating estate pieces and buyers assembling personal collections. Ring resizing and clasp repairs keep existing pieces wearable, a restoration workflow that runs parallel to the formalwear alterations at Antonio's Tailor Shop for the same occasion-driven clientele. The appraisal desk evaluates diamonds using the GIA four-C framework — cut, color, clarity, and carat — and tests precious metals with touchstone assays calibrated for 10K through 24K gold and 925-standard sterling silver.