Founded in 1978 as a wholesale rough-gemstone importer, Serengeti Jewelers operates from Suite 510 of the Jewelers Exchange on Sixth Avenue in downtown San Diego's Gaslamp Quarter. The firm sources Tanzanite, ruby, sapphire, and tsavorite garnet rough from East Africa and Madagascar, cuts colored stones in-house, and manufactures finished jewelry using CAD/CAM technology—a mine-to-market integration that parallels the craft-to-display ethos at Mingei International Museum in Balboa Park. Serengeti's sourcing network extends across Colombia, Southeast Asia, Belgium, and Israel, with GIA- and AGS-certified ideal-cut diamonds rounding out the colored-stone inventory. Services span custom jewelry manufacturing, estate buying and brokerage, luxury watch brokerage, and mine consulting for investors evaluating colored-gemstone deposits. The gemstone-sourcing expertise connects to the mineral and crystal market served by downtown retailers like Earths Elements in the Gaslamp. Highest-value projects involve cutting and mounting large-carat Tanzanite rough exceeding 10 carats per stone, calibrating tsavorite garnet suites for graduated necklace settings, and sourcing certified Burmese and Sri Lankan origin sapphires for bespoke collector commissions.