For the first time since 2014, GemGuide has restored Montana sapphire pricing to its corundum section, effective January 1, 2026. The new charts focus on blue, teal, and green stones primarily sourced from the Missouri River and Rock Creek deposits, excluding the rare and sporadically produced Yogo Gulch material. To reflect the specific market for this material, the pricing is categorized into "good," "fine," and "extra fine" grades for stones up to 2.99 carats, as larger sizes remain uncommon. These subscriber-exclusive tables are now available across GemGuide’s digital app, flipbook, and print editions, with plans to expand the color categories in future updates.
