Established in 2003, the Blue Jewel Mine has sold over 10, 000 karats of sapphires to date. We are located at the Eldorado Bar in the beautiful Rocky Mountains of Montana.Operating from mid-April through the first freeze of the season, the Blue Jewel Mine is a great place to spend an afternoon or more mining for sapphires and gold. Whether you are purchasing a yard of rock or paning for gold, we are sure you will enjoy the thrill of finding a good sapphire. Come spend an afternoon with us. Take in the beauty of the mine nestled at the base of the Little Belt Mountains, surrounded by various wildlife and close to the Missouri River. We mine all our gravel & sapphires from the Blue Jewel Mine on the El Dorado Bar, an ancient gravel bar lying above the Missouri River not far from Helena, MT.No treatment of any kind is used on these gems. Each unique sapphire is a natural beauty! Most sapphires sold online or in a jewelry store are heat treated, irradiated, diffused, glass filled, oiled, or even synthetic. If youre looking for an untreated, all natural sapphire at below retail prices, youre at the right place!Many experts rate Montana Sapphires as The Finest Sapphires in the World!. They have a very high refractive index which is why there is such a great internal fire in these stones.Please feel free to visit our web site at, or contact us at 406-227-5173. We are still in the process of updating our online store, but we do have several sapphires in stock now. Thank you for your time and we look forward to speaking with you further.