Where is the only source of gem-quality benitoite located?

The only source of gem-quality benitoite is located in California. This striking blue gemstone was discovered in the San Benito County in the 1900s. Benitoite has become quite rare and is even designated as the official state gem of California due to its unique and vibrant color, along with its scarce occurrence.

Unlike other locations that might be known for various gemstones, the historical and geological context of California provides the specific conditions necessary for the formation of benitoite. Geologically, it is found in association with other minerals in a limited area, emphasizing its rarity and the significance of the California site for gem-quality specimens. Gem enthusiasts and collectors value benitoite for its aesthetic qualities and unique origin, making California the sole source recognized for this particular gem.