Potentate Mining
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Potentate Mining LLC is a privately owned Montana corporation developing the sapphire and gold resources of Gem Mountain at Rock Creek near Philipsburg
Potentate Mining LLC is a privately owned Montana corporation developing the sapphire and gold resources at the Rock Creek Sapphire (TM) mine near Philipsburg. Potentate is the largest producer of rough sapphires in America. Potentate has produced the largest gem quality American sapphire crystal on record called the 'Ponderosa Sapphire' of 64.13 carats- now in the Smithsonian Collection. Also hav
Potentate MininG LLC in conjunction with the Bonas Group is pleased to announce that the first day of the Montana Sapphire tender in Bangkok was very well attended with a full day booked on Day 2. Clients from around the globe have expressed their interest in these unique rough sapphires from The Rock Creek Sapphire mine near
06/20/2026
Potentate Mining LLC and Bonas Group announce the 4th Rough Montana Sapphire tender in Bangkok from June 25th to June 27th 2026
Nice summary video clip by Guild in Shenzhen
05/02/2026
Potentate Mining LLC, North America’s largest producer of sapphires, is pleased to announce that Mother Nature has allowed us to commence our mining again for the season at the Rock Creek sapphire mine near Philipsburg Montana. The winter months have been busy and the frozen ground permit us to complete a winter drilling program. This drill rig recovers sausage like rolls of unconsolidated gravels which are carefully logged and analyzed for their contained sapphires. This allows the geologists to plan & select areas for mining in the 2026 summer season. Of course the mining requires heavy equipment so we have recently acquired a new CAT excavator and haul truck.
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Suite 1800, 8 King Street East
Toronto, ON
M5C1B5