Just Ma Jewelry

Just Ma Jewelry is a New York City jewelry and watch repair business located in the Diamond District at 30 W 47th Street. Established in 1983, the shop handles repairs in-house through its own bench jewelers, serving customers who visit in person or send items by insured mail. Services include ring sizing, laser and torch soldering, prong repair, stone setting and replacement, pearl and bead restringing, and chain, clasp, bracelet, and earring repairs.

The team also restores worn or misshapen pieces and creates custom jewelry to order. Its watch services include mechanical movement cleaning, lubrication, regulation, testing, battery replacement, and other repairs; the website references work on brands including Rolex, Omega, Cartier, and Movado. Customers can request a free estimate, with most in-person quotes provided on the spot, and eligible shipping is available through prepaid, insured labels.

Simple repairs may be completed the same day, while many standard jobs take about 7 to 14 business days after approval. Repairs are backed by a one-year guarantee