For GIA-certified diamond appraisals and custom fine jewelry design in downtown San Diego's Gaslamp Quarter, Chappellet & Co has operated from Suite 200 at 835 Fifth Avenue since 1995, serving clients by private appointment for engagement commissions, estate liquidation, and timepiece restoration. Trust-and-estate jewelry portfolios handled through the Fifth Avenue suite require scheduled-value appraisals for insurance underwriting, a documentation process that integrates with commercial brokers like Cavignac for high-net-worth coverage. The in-house bench also services fine mechanical watches, performing movement overhauls and crystal replacements alongside jewelry resizing, prong retipping, and stone remounting. Loose diamond and rare gemstone inventory includes sapphires, tanzanite, and jade, each evaluated under 10x loupe and spectroscopic screening before entering the custom-design pipeline. Custom bridal commissions involve multi-appointment design sessions that run concurrently with formal-wear fitting at nearby ateliers like Sante Tailoring. Highest-tier restoration services include full-recut and re-polishing of damaged diamonds using precision faceting equipment, restoring crown and pavilion angles to manufacturer specifications for stones up to five carats.