California Gemstones at Grossmont Center in La Mesa stocks a rotating inventory of crystals, mineral specimens, fossils, and natural stone jewelry near the food court on Grossmont Center Drive. The selection ranges from cabochon-cut tourmalines native to San Diego County pegmatite deposits to imported amethyst clusters and citrine points, a mineral-focused approach that complements the finished fine-jewelry inventory at Jewelry Loft elsewhere in La Mesa. Sterling silver jewelry set with natural stones is produced on-site or sourced from regional lapidary artists, with custom sizing available on select ring and pendant designs. Fossil inventory includes ammonite specimens and petrified wood cross-sections, drawing geological hobbyists and interior designers sourcing statement display pieces for residential and commercial projects. The shop's specimen labeling and gift-ready packaging make individual crystals and tumbled-stone sets viable as curated presents, a specialty-gift format that runs parallel to the botanical arrangements at 96 Flowers & 13 Stems for occasion-driven purchases. Collector-grade acquisitions include large-format geode halves with druzy quartz interiors and museum-quality trilobite fossils from Cambrian-era formations, each evaluated for crystalline structure and provenance documentation.