Former Geologist here - just looking for some interesting specimens for my young nephews, both budding rockhounds. What I found was a large cache of great crystal assemblages, cabs, slabs and high-polish sphericals, plus many samples that positively glow under UV light! Ask there owners to demo the pink Calcite under UV - absolutely beautiful .Great shop. friendly owners! read more

Gemstones galore. Wide variety. Honestly, I couldn't help myself. 5-star collections. Great prices. read more

As a geologist, I adore authentic rock and gem shops owned and operated by true mineral enthusiasts. Kathy's Krystals is just such a place. We stopped in for the first time today and viewed an impressive selection of beautiful, unique pieces. They carry notably high quality specimens of labradorite, opal, malachite, pyrite, tourmaline, olivine, quartz, calcite, and more. The minerals we viewed ranged in price from $5 to $700+, and we were not at all pressured to buy (which I am super-sensitive about). Like others who've left reviews, we didn't realize shopping is by appointment until we arrived and discovered this shop is in a lovely residential neighborhood. We called the phone number listed on Yelp, and the proprieter opened up for us right away. He treated us like old friends, and I would love to go back and shop there again. Highly recommend! read more

Extremely extensive collection of Crystals! I didn't read directions and failed to make an appointment but Jack graciously opened up the showroom for me. Definitely recommend! read more

I have to say hands this is the most amazing, beautiful crystal/stone place I've ever been to. Kathi and Jack are just amazing beings, they have a wide collection. Such an experience, Jack is extremely knowledgeable about all the crystals/stones. Definitely recommend. read more

I heard from a friend about Kathi's Krystals and I'm really happy I did! Jack was very inviting and had a beautiful and wide collection. He knew where all the crystals (which were some of the nicest quality I've seen) originated from, and he shared great knowledge with us during our visit. My new go to crystal shop! read more

My husband Kasey found Kathi's Krystal for me and I was not disappointed! Jack was so helpful. He knew where almost all his stones came from which is amazing. The stones seems endless here and there's stones of all sizes so if you like ones you can carry easily or you like a gigantic piece for decoration they more then likely have you covered! I could have spent hours in there touching everything stone and finding the perfect ones for my collection. So many jumped out at me there's only one that I was able to hold and see that I didn't get and I literally dreamed about. As we left Colorado this morning I thought to myself I really am not going to be happy until I get one and bam you guys have a website and ship as well. That makes me really happy because I just know I didn't get to see everything because my husband and kiddos were in the car. Jack was very knowledgeable and showed me some really awesome and rare stones. I can't wait to go back and let me husband check it out! Clean, super organized and so helpful. Congrats and enjoy your new grand baby. read more

Kathi's Krystals - Crazy lace stone - Gemstones & Minerals Near Me - Boulder, Colorado

Fabulous place for crystals and gemstones, online and in person. Had emailed Jack about a crystal I saw on the website and was able to go in on Labor Day and check it out in person. Jack let me sort through many specimens to be sure I had the right one. Jack's passion and knowledge comes through without any arrogance- he is there to help you find just what you need. Will be back for sure. FYI all COVID precautions are in place, so you can feel safe while taking your time finding the right crystals. read more

Kathi's Krystals - Mookaite Jasper - Gemstones & Minerals Near Me - Boulder, Colorado

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What a gem of a place!! (Pun intended). Seriously though, it's a fun experience to see such an array of beautiful stones. At Kathi's Krystal's, the owners certainly have no shortage or sparkly items, but they go above and beyond to tell the origin of each crystal. My son Oliver is obsessed with crystals, and he can't stop talking about Jack and his rocks. Call first to make sure they are open, as the shop is operated out of the home. read more

What an amazing experience! My five year old son and I spent some time with Jack, and let me just say that he is insanely knowledgeable. I really enjoyed learning all he would tell me. You can tell this is his passion. Their stunning and rare specimens, the volume of inventory, and the relaxed and private buying experience all make Kathi's Krystals unique and super special. I will be returning very soon. I learned so much, and my son had a great time too. Jack - you should teach informational classes for people who just want to learn more about crystals and gemstones! You are a wealth of knowledge, and it was a pleasure getting to know you. Thank you so much! read more

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I had the best time meeting with Jack, Kathi, and Okie. I needed advice on some minerals, and Jack took the time to explain all of my questions. Beautiful showroom with many great specimens of such a wide variety. read more

We showed up without an appointment, not realizing the rock and crystal collection was in a residential neighborhood. We almost turned away, but I'm so glad we didn't. After a quick chat with Jack on the phone, he came outside and led us into his home. We were blown away by an amazing collection of high quality stones and crystals. Personally, I'm drawn to the physical properties and geographic facts surrounding stones rather than the spiritual connection many have with crystals. Jack is a true collector, and I found it refreshing to hear what was important to me about the stones, instead of hypothetical healing properties. Jack was extremely friendly and personable. He showed us his personal collection, with some of his earliest crystals that he purchased at the age of 10. I would highly recommend visiting their shop, and we will definitely be back. read more

I've been collecting for around five years and I don't think I'll ever stop saying that Kathi's Krystals is the best source when it comes to crystals. I only got to visit Jack and Kathi once since I'm from the Midwest, but they gave me a very memorable and positive experience. My friend and I were looking for a shop while in Boulder for a day on vacation. We called the number online since we were directed by gps to a home and were confused. Jack answered and was luckily available then to allow us to come in. He was delighted that wanted to come see his collection. We were warmly invited into their home to browse the rocks for sale, which was so kind to me. The whole idea was. Jack felt like a friend to us, sharing incredible stories and rock knowledge I've never heard before. He was very helpful in us finding what we were looking for and more. Jack and Kathi seemed very passionate about crystals and I believe that's what every "shop" needs. I also know I'd never been around such genuine specimens until I came here. I purchased a rutile quartz and a ruby in fuchsite. I wanted a moonstone but it was more expensive than I what wanted to spend, so Jack suggested he'd hold it for me thinking I could come back and get it later. He called me recently asking if I still wanted the moonstone after all of this time. I had been thinking of contacting him but just hadn't gotten around to it and was very grateful that he reached out at a good time. After I reminded him I did not live in Boulder, he said he'd ship it out instead and sent me an invoice. I received my package in less than a week from that. I will be back whenever I get to Boulder next. If you're looking for a unique and reliable crystal shop, come check them out. You might find exactly what you're looking for. Thank you so much Jack and Kathi, for the whole experience. This moonstone is one I will always hold close. It's one of a kind. read more

Kathi's Krystals - rainbow moonstone - Gemstones & Minerals Near Me - Boulder, Colorado

Jack and Kathi are awesome, Talking with Jack and his knowledge is unsurpassed. Highly recommended. I will always go there for any gem or stone project I have. Thank you Jack for everything. read more

Amazing collection! It's so nice Kathi and her husband have opened their space to the public.

We loved our experience with Jack and his lovely (and super talented) dog Okie. Jack's knowledge and passion for stones/rocks was super impressive and incredibly helpful. I learned so much just from chatting with him. I loved that he left out all of the metaphysical nonsense and just focused on the stones themselves and on the needs of his customers. My partner and I walked in and told him our budget and that we wanted some unique pieces and he spent over an hour with us, discussing various options, illuminating pieces under black light (so magical), telling stories and genuinely connecting with us, etc. This was such an intimate, personal experience of rock-buying. Jack is such a kind-hearted human and you'll love your experience with him and will be sure to find a wonderful treasure because his selection is incredible. Don't be put off by the private appointment set-up or the fact that this business is at his home; Kathi's Krystals is seriously such an unique, awesome place. read more

This is truly an experience you should not miss out on! Kathi's Krystal's are THE place to have your crystal shopping experience. Jack who is the most gracious host because his heart is sharing with you anything you would like to look at and experience. There is no rush or push to buy anything.....there is only fun out of playing and exploring the vast selection. Don't leave without Jack showing you Kathi's wire-wrapped pieces as they are truly the finest I have ever seen! They are all exquisite as she is an amazing artist! We spent about 2.5 hours with jack and it was truly a pleasure learning through his incredible knowledge about the many rocks and stones. You will walk in a as a stranger and leave as a friend. Truly a wonderful experience you shouldn't miss out of! read more

Thoroughly enjoyed Kathis Krystal's and Jack that showed us anything and everything we requested! He is so sweet and let us stay and make a mess of rocks in his basement for 2 hours! He is very knowledgable and has a wide selection of rocks, tumbled stones, agates and more! I left after two hours with 3 new pieces that I'll treasure forever. read more

Incredible experience. Couldn't have asked for a better selection. This lovely couple really has it all and they will take the time to go through everything with you. Definitely recommend visiting their home/shop if you're ever in need of rare, beautiful, and fair priced crystals and gems! read more