Gold Refinery of San Diego has operated a direct-to-public precious-metals refining office on Mission Gorge Road in Grantville since 2008, holding California State License Number 3711-1905 in the 92120 ZIP. The refinery model eliminates the middleman markup that jewelry stores, pawn shops, and gold-party buyers build into their offers, quoting up to 99 percent of spot price on scrap gold jewelry. Private transaction rooms at 5859 Mission Gorge Road let sellers watch every step of the testing and weighing process before receiving a no-obligation cash offer. Homeowners insuring high-value jewelry collections before or after a sale work with nearby agents including Farmers Insurance - Joseph Darcey in Grantville for scheduled personal-property riders. The company appeared twice on the Inc. 5000 list of fastest-growing private companies, ranking number 323 in 2014 and number 473 in 2015, and has been featured in the San Diego Union-Tribune and on ABC 10News. A GIA Graduate Gemologist and a watch specialist are on staff to evaluate diamonds, high-end timepieces, and brand-name jewelry that commands above-scrap valuations. The bullion division buys and sells gold, silver, platinum, and palladium with a $2,000 minimum on sales, a half-ounce minimum on gold and platinum purchases, and a 50-ounce minimum on silver purchases. San Diego sellers find the refinery just off the I-8 freeway at the Mission Gorge Road exit, behind the red-brick Italian restaurant on the east side of the street. Capital-gains reporting on precious-metal transactions runs through firms including Goldstein & Goldstein in San Carlos, whose proximity to the Lake Murray Boulevard corridor serves east-county clients. Sterling silverware at .925 purity, dental gold, platinum settings, and palladium catalytic-converter salvage round out the metals the refinery processes through its on-site smelting operation.