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    Gem Mountain Sapphire Mine

    3.8 (27 reviews)
    Closed 9:00 am - 4:00 pm

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    There were 6 of us, 4 adults and two kids. We drove 3 hours from Flathead Lake to get there. It was a great adventure. Wonder, friendly staff. They even went and got water for our dogs. And at the end of the day, they brought the dogs "pup cups" They showed us how to do everything and were there to answer any questions. It's a little on the spendy side. 50 dollars a bucket. We got 3 buckets. We spent 3 hours going through our buckets. We ended up with some small stones, nothing really exciting. They evaluated on site, you could then spend more to send stones out to be heat treated and/or cut. Largest was 2.25. But we had fun and that's the important thing. My only complaint is they need way more benches for us grandparents.

    Krysten I.

    We made a reservation about a month prior to visiting gem mountain. Driving to the "mine" is a commitment, so I'd suggest making a reservation. They did take walk-ins on the Saturday we went, but idk if that was just a slow day for them. We bought the "lucky 7" for $240. Seems like a good investment if you're trying to get lucky. We saw on the board that someone had found an 8 carat sapphire a couple days prior. We hoped to get half as lucky. Unfortunately we didn't. We found a lot of sapphires, but none of them were larger than 2 carats. More about this later. We made a reservation for 9:30am when they opened. This was both good and bad. First, there is a long line of people waiting to check in at 9:30. It's not that big of a deal, but if you don't like lines, I'd suggest making your reservation for like 10am instead. The good part about making an early reservation is that the weather is still bearable in the morning. It was really hot when we left at 1:30. People had major sunburn. So once we were checked in and paid, we exchanged our tickets for buckets of gravel. One of the workers showed us how to pan for the sapphires. There's kind of a rocking technique that concentrates the more dense sapphires at the bottom of the pan. Then we dump the pan onto the table and pick out the sapphires with tweezers. It was honestly pretty fun. The sapphire sparkle in the sunlight so they're pretty easy to see. Some people opted to sit under the tents and pick through their pans on the tables in the shade, but it's much harder to spot the sapphires in the shade. After about 30 pans, we had collected about a vial and a half of raw sapphires. We went to get them inspected and only about 10 of them were even worth making into jewelry. We decided to get the 6 biggest ones heat treated and cut, a process that the people at gem mountain will do for about $35 per stone. Oh and it takes a year. Overall, it was a pretty fun experience. I wouldn't trust kids to do this well, but it seems like a lot of families come here. All of the workers were very nice and it seems like a pretty honest business of selling an experience. It's kind of a long drive, but I would do it again :) I'm also very excited for my sapphires to be ready.

    Random vintage wagon on the property...
    Jeff B.

    This place is tailor-made for my rock hound youngest daughter, and the focus of a Daughter-Dad getaway before she starts high school in a week. Don't come here expecting to hit the Comstock Lode. However....you will definitely find sapphire if you do the work exactly like the staff shows you how. We (she) only went through one standard bucket, but came away with 25.60 carat weight in stones, to include two pretty good sized pink ones that may one day adorn as a necklace. I have no clue the value/worth, but I can state the joy it brought my budding little geologist was priceless. I was relegated to being the guy that just grabbed the biggest rocks, and threw them off to the side; and then of course taking my turn at the sluice. And you learn quick that you rinse your product two, or three, more times. You find stuff you missed. The mine is in a very remote area, but if you stay in Philipsburg MT, like we did the night before, it's only a pretty 30-min drive away. Big thanks to the entire staff, for their patience with newbs like us, and pros like some of the folks we met. We even purchased a 'bucket to go,' because my kiddo wanted to go through it with some of her teen pals. I'm about ready to kick myself for not bringing home another bag. You might not like the price ($36 for a bag of rocks/clay/dirt), but you'd blow that grabbing coffee for your office mates, with tip. It is curiously satisfying, even for an undiagnosed ADHD like me. Next visit we will allow ourselves more time, and stay another night in beautiful/historic Philipsburg...

    Crystal A.

    Gem Mountain Sapphire was a fantastic experience. I am not a rockhound but my boyfriend is and he agrees that Gem Mountain was top notch. Reasonable price for sapphire payout, incredible service that is beyond helpful and friendly. After you work your buckets they offer evaluation, heat treating and faceting services. We went out to the actual mine area when it opened Memorial Day Weekend which made for a pretty drive.

    Cool stuff here!
    Dawn T.

    This place was awesome! Went there with the Tenacious Dames Motorcycle Club, a bunch of women motorcycle riders all fighting over who is next in line to go gem hunting. An over exaggeration, but a bunch of us went and it was great to do some easy gem hunting there. Lots of people to assist and teach you how to wash and look for gems and then a great lady named Jodie to help you grade them! A must stop place if you are going through PBurg!

    This is all one sift from a mega jug
    Courtney Z.

    It's been a few years and Gem Mountain is still the best part of my cross country move. I ended up with 2 lovey 1 ct blue sapphires of amazing quality, 5 or 6 .20-.40 ct sapphires of various colors and the 1 ct light blue cushion cut I had made into a necklace pictured. Really the reason I can picture it now is because I wear the necklace 24/7. I wasn't made at Gem Mt so I can't speak to that. This light blue stone was 3.4-4 ct and has a large feather (a visible flaw) across the center. Gem Mt told me it could be cut to not have a flaw and would most likely lose 75% of the weight. I was ok with a large feather and said to have it cut to keep as much weight to the stone as possible. I love it. Yes there is a large feather but as I had it set in a necklace no one can see it.

    Our lucky stones after 7 buckets. These are our raw stones.
    Renita R.

    We planned a road trip from San Antonio, Texas just to experience finding our own sapphires. Staff was extremely helpful all through the process! I would gladly go back if it wasn't so far away! Instead, my daughter bought a mega jug and had it shipped as my Christmas present. Not quite the same experience, but a wonderful memory of picking through gravel on Christmas morning!! We were at Gem Mountain end of July and received our sapphires after heat treatment and cutting in the middle of March. We are in love with our treasures!!!!

    "The Entry Sign"
    Stephen A.

    We had a wonderful time washing and screening for sapphires this Summer. The people who work there are helpful and wonderfully positive. We are definitely looking forward to also heat treating and faceting some of our gem quality rough! Thanks to the mine owners for providing this fun & wonderful opportunity for everyone!

    Wonderful cracked stone I got back. Spend your money elsewhere!

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    1 month ago

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    28 days ago

    Terrible staff. Small selection of goods. When in supply. Overpriced. Go to Helena. I had been publicly humiliated at this facility.

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    8 years ago

    We had such a great time, it was the highlight of our trip. The employees were fantastic!

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    11 years ago

    Lots of fun to go do and you get treasures! We have a purple sapphire even and about 25 cuttables! Can't wait to see what happens!

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    Ask the Community - Gem Mountain Sapphire Mine

    What if it rains? Will they close?

    No. However, if there is lightening, washing in the metal trough will be suspended until the danger is past.

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    Review Highlights - Gem Mountain Sapphire Mine

    Not quite the same experience, but a wonderful memory of picking through gravel on Christmas morning!!

    Mentioned in 8 reviews

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    Gem Mountain Sapphire Mine - jewelry - Updated June 2026

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