Gem Mountain Sapphire Mine and the Montana Sapphire Store - Wash Gravel Find Montana Sapphires. Direct from the Mine: Montana Sapphire Gemstones and Jewelry. Sapphire Mine Open Seasonally: Memorial Weekend to Labor Day weekend. Wednesday through Saturday. Our Gallery is open Year Round, 7 days a week( major holidays excluded) in Beautiful Downtown Philipsburg, MT. Indoor gravel washing, heat treating, faceting, Montana Sapphire Gemstones and Jewelry direct from the mine. Rocks, fossils, crystals and more. We also have Philipsburg clothing and many Made in the USA, Made in Montana, and Made in Philipsburg, MT items.
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