Thelma's Jewelry Shop in Chula Vista runs a custom jewelry design and repair studio on Beech Avenue, west of the Broadway corridor in the 91910 zip code. The workbench handles ring resizing, stone resetting, and chain soldering alongside original design commissions, a full-service jewelry bench that parallels the bespoke personal-adornment craftsmanship at Glam Powder Room in Chula Vista's broader beauty and accessories scene. Custom pieces progress from pencil sketches to finished metalwork in-house, allowing clients to approve each stage of a ring, pendant, or bracelet before final polishing. Restoration services cover vintage and estate pieces — loose prongs, worn clasps, and tarnished settings — the kind of inherited jewelry that circulates through Chula Vista's secondhand market, including the curated vintage inventory at Upright Citizen. The bench handles lost-wax casting, hand engraving, and prong fabrication for replacement settings on stones up to two carats, using a standard jeweler's torch rated for 14k and 18k gold alloy work.