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Anna on January 23rd, 2023

Precision Cut 1.24ct Golden Mali Garnet

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Absolutely gorgeous Mali garnet, even more beautiful in person! Shipping was quick and the packaging was very thoughtful. Unfortunately for my wallet I’ll definitely be back for more!


Karmen on February 22nd, 2022

Precision Cut 2.09ct Merelani Mint Garnet

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I just received my mint garnet and I absolutely love it. This is the 2nd stone that I have gotten from you guys and it is beyond my expectations. The video of the stone on your website was great but it is a million times better in person! I can't wait to get it set and start wearing it!


Elin on December 23rd, 2021

Precision cut 1.45ct pink-lavender Malaya Garnet set in a 14k Yellow Gold Legends Ethereal Ring.

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I love working with Chrissy and Jon. I wanted a custom gold ring with my birthstone garnet. Based on my messages Chrissy showed me roughs, renderings of cuts for the stone, and different settings for me to choose from. The end result was fabulous and I will do more custom working with them in the future.


Rachel on September 1st, 2021

Precision cut 1.09ct Blue & Green Kenyan Sapphire set in 14k Yellow Gold Ring with Moissanite Triangle accents

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I LOVE THIS RING!!! It was a fun collaboration between my fiance, me and Jon and Chrissy. From the first meeting where I was able to describe my vision, Jon and Chrissy listened and made lots of helpful suggestions. I learned a lot about sapphires and the entire gem cutting and ring making process. Now that I have my ring, I love the way the sapphire changes colors in different lights and I'm so glad that Chrissy suggested moisanites as accent stones because they have so much color in them! I love this ring and think I'll love it forever! Thanks to Geologic spectrum for helping to bring this idea to life


Kelsey on August 9th, 2021

Precision cut 0.85ct Yellow Australian Sapphire set in 14k Yellow Gold Vintage Sun Halo Ring

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One of the best jewelry experiences I’ve ever had! Jon and Chrissy are fantastic and helped me design my dream ring. They worked with me to help pick a stone the right size that I would love and pick a unique ring design to set it in. Can’t say enough about how much I love this ring! Thank you both!


Tabitha on April 20th, 2021

Precision cut 1.7ct Icy Blue Montana Sapphire

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Absolutely love my sapphire! Really appreciate the level of care and attention that went into the stone, as well as, the packaging and information that it came with (makes it feel that much more special to know its story). Will definitely return to buy more stones in the future and highly recommend


Hannah on April 17th, 2021

Precision cut 1.33ct Grass Green Tourmaline

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Beautiful stone. Even more wonderful in person. There is a lot of care and detail that go into their work and the packaging. Highly recommend this seller.

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Dan on April 6th, 2021

Precision cut 1.15ct Teal Montana Sapphire

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The stone is incredible, exactly what I was looking for. Jon takes chances with shapes and designs that you cant find anywhere else, and the final product definitely reflects that same rare quality. Just as impressive as the stone was the level of care, consideration and ease Jon & Chrissy put into developing a top notch client experience. They go above and beyond to make sure a one-time customer becomes a client for life.. From quick answers on all questions, to actually receiving the stone in the mail, the entire process was simple and effective. On top of arriving quickly, each element of the stones packaging was undoubtedly personal, thoughtful and intentional. The entire process felt One of One: personalized, custom, and very unique. Thanks for helping make our engagement so special!


Patricia on November 18th, 2020

Precision cut 1.25ct Montana Sapphire Moon & Stars Engagement Ring

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I love my custom engagement ring and the beautiful Montana sapphire Jon cut for it! It's definitely a unique piece that fits my personality perfectly. Thank you both for helping to make this such a wonderful experience!


Erin on June 10th, 2020

Precision cut 2.28ct Spessartite Garnet

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It’s beautiful and the service I received was incredible!

2019-11-19 23-45-23 (B,Radius8,Smoothing

Tak on December 16th, 2019

Precision cut 1.07ct Montana Sapphire

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Tak on December 16th, 2019

Precision cut 1.9ct Yellow Tourmaline

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2019-12-01 22-45-03 (B,Radius8,Smoothing

Tak on December 16th, 2019

Precision cut 0.79ct Rock Creek Montana Sapphire

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Kirsti on August 21st, 2019

Precision cut 1.5ct Purple Rhodolite Garnet

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Absolutely stunning with lots of fire and saturated color! Garnets are my birthstone and I especially love rhodolite garnets. I plan to have this set as a necklace, but it has so much sparkle, that I may have it made into a ring instead so I can see it sparkling all the time. I really appreciate the extra care the seller took to make sure this arrived safely and to provide very interesting background on my individual gem. I highly recommend this seller! Thank you.


Kurt on June 30th, 2019

Precision cut 3.8ct Mozambique Garnet

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Jon did an excellent job! The garnet is beautiful. It came quickly with no hitches. It couldn’t have been a better transaction!


Evy on June 18th, 2019

Precision cut 1.05ct Light Blue to Gray Montana Sapphire

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Evy on June 18th, 2019

Precision cut 1.4ct Honey Zircon

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Lauren on June 11th, 2019

Precision cut 0.7ct Lavender to Light Blue Umba Sapphire

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I was going to wait to have this set before I reviewed. But I’m slow. Great service beautiful stone.


Nicole on April 5th, 2019

Precision cut 0.82ct Tunduru Garnet

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Gorgeous garnet! The color is pretty accurate in person, as depicted in the listing. For some reason, I can’t seem to capture its true color in photos. Haha! Thank you, Jon and Chrissy!


Robin on May 27th, 2019

Precision cut 2.28ct Malaya Garnet

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Jackson on May 26th, 2019

Precision cut 0.9ct Gray Umba Sapphire in Custom Engagement Ring

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I requested something I couldn’t find online or in a store – a kite cut blue-grey sapphire. Jon and Chrissy found me the perfect rough stone, did a unique cut on it, and then designed and facilitated the creation of the engagement ring I had in my head. They did an amazing job, the stone and ring are better than I could have imagined, and me and my fiancé are extremely happy with the ring. Thank you Chrissy and Jon for helping make sure a one of a kind ring for us!


Roberta on February 21st, 2019

Precision cut 1.7ct Peachy Pink to Orange Mahenge Garnet

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Oh so beautiful, also appreciated the description sent with it.


Kim on February 7th, 2019

Precision cut 1.4ct Rhodolite Garnet set in sterling silver ring

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The color of the ring is so beautiful and the cut makes it so sparkly. I’ve never seen a color gemstone that has so much “life” in it! The setting is very simple and pretty allowing the stone to be the main attraction! The ring was beautifully packed and it was very cool to have the information about the history of the stone included! Thank you so much!


Bradley on January 29th, 2019

Precision cut 2.35ct Rhodolite Garnet

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This guy is awesome to work with, helped out with my price range, and cut this custom garnet to suit the size and cost of what I needed and could afford. Safe to say it’s an amazing stone.


Denier on January 1st, 2019

Precision cut 2.8ct Amethyst

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This was a commissioned gemstone. From start to finish the experience has been perfect. Jon is a pleasure to work with, and his passion for his craft sparkles in tune with my amethyst. Excellent communication and patient with questions. I’ve always wanted an amethyst and I truly have never seen one so beautiful. It will be awhile before this purple treasure is set, but I will add a picture when I do so.


Alex on December 23rd, 2018

Precision cut 1.4ct Purple Garnet

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This stone is gorgeous! The stone came nicely packaged with a card describing what it is and where it came from. I would absolutely buy from this seller again.


Kelsey on December 22nd, 2018

Alexandrite Accent Band

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I am so crazy in love with my custom wedding band from Geologic Spectrum. Chrissy worked with me to find the perfect setting to fit against my engagement ring and the Alexandrite they used in the band is just drop dead gorgeous. I wish the Alexandrite in my engagement ring had as much color change as the ones they used! Needless to say, I am extremely satisfied with the service and quality of work from Geologic Spectrum and I will absolutely be recommending them to everyone I know. I can’t wait to wear this band in October!


Molly on December 7th, 2018

Precision cut 1.5ct Orange-Peach-Pink Tunduru Zircon in sterling silver ring

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No photo can capture the true brilliance of this gem. The cut is beautiful and the light play is stunning. They are very helpful, every step of the way. Quick and helpful when answering questions an dthey even helped me pick out what I wanted to set the gem in. I would recommend them to anyone who wants a unique piece of jewelry and am sure I’ll be purchasing from them in the future!


Yoshie on December 7th, 2018

Precision cut 0.8ct Purple-Pink Spinel

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Great stone, great cut and great communication. Regarding gemstone purchase, this is the only place I completely trust. The only thing I complain about is, their stone is so perfect by itself that I have no idea how I’ll make a piece of jewelry with it! I totally recommend the seller.


Karmen on December 6th, 2018

Precision cut 0.78ct Teal Montana Sapphire

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Beautiful stone…they were great to work with…answered all of my questions and were very helpful! Thanks so much I can’t wait to get it set in a ring!


Colleen on December 4th, 2018

Precision cut 0.84ct Blue-Green Montana Sapphire

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Really nice round precision cut! Very sparkly and in some lighting the whole thing just lights up and glows. I do feel like “blue/green” is way too simple a description of the color – it shifts from silvery grey, almost colorless in indoor lighting to a pale blue aqua outside sometimes mixed with green. In mixed lighting it’s a bit moody and a hard to describe grayish-green-blue color, but I grew to love all its moods. This color shifting is typical of Montana sapphires and I wouldn’t have it any other way!


Carlos on November 28th, 2018

Precision cut 1.4ct Blue-Green Montana Sapphire in Custom Ocean Inspired Ring

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Amazing gem! This shop not only provides you with a great rock, but it gives you geological background about where it comes from and about the mineral, did not expect less from a geologist. I am very happy with this purchase.


Shelby on November 15th, 2018

Precision cut 1.0ct Watermelon Tourmaline in 14K White Gold Ring

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This ring is so beautiful! Jon did a wonderful job with the cut and the tourmaline catches the light perfectly. But thanks to Chrissy helping me pick out a setting. The ring came quickly and in beautiful packaging. I loved the little note that came with it describing the stone and the box.

Thank you both so much!


Shannon on October 25th, 2018

Precision cut 0.33ct Rock Creek Sapphire

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Jon has a great eye for creating the best from any rough gem and I love love love this Montana sapphire! The inclusions in it make it so unique and I can't wait to work with Chrissy to get it set into a simple ring. Excellent quality and quick delivery, thanks!


Stephenie on October 23rd, 2018

Precision cut 1.4ct Montana Sapphire

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Lovely sapphire. So shiny. I can’t wait to get the necklace made for it.


Lori on October 16th, 2018

Precision cut 0.89ct Seafoam Green Tourmaline

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I love my purchase, a beautiful stone, beautifully cut. Quick shipping and fun packaging. I strongly recommend this seller.


Mia on June 28th, 2018

Precision cut 1.3ct Morganite

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Absolutely stunning stone. Very well cut, with incredible attention to the design of the cut! Has a lovely way of playing with the light. Just as pictured! And loved the notes that went with the stones I purchased, explaining their stories.


Mia on June 28th, 2018

Precision cut 0.7ct Morganite Kite

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Beautiful stone, just as pictured! Fast shipping, and lovely service. Very stunning work.


Sebastian on June 27th, 2018

Precision cut 1.0ct Rhodolite Garnet

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Amazing stone with a lovely cut. We directly brought it to a goldsmith, and are currently waiting for the final ring!


Sebastian on June 27th, 2018

Precision cut 1.8tcw Umbalite Garnet Pair

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We are completely happy with the purchased pair. They were custom cut for a pair of ear-studs. Jon was very helpful and gave us lots of advice. The stones arrived on time in a lovely package. Looking forward to our next purchase.


Hannah on May 17th, 2018

Precision cut 1.0ct Watermelon Tourmaline Ring

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This is a beautiful specimen and I could not be happier with the color(s) and cut. In person, it is even more amazingly bright and absolutely jaw-dropping. Jon really knows how to optimize the cut to get the best yield and brilliance out of these specimens. In addition, Jon and Chrissy were extremely helpful not only with the purchase, but with the logistics of getting the tourmaline set into a ring as well. All in all, I cannot wait to buy more form them in the future.


Muizz on April 21st, 2018

Precision cut 2.5ct Flame Fusion Sapphire

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Great experience buying from Jon and Chrissy. They were very accommodating during the process of setting it in a necklace. The information card was very nice too!


Rae on April 20th, 2018

Precision cut 1.5ct Colorado Topaz Silver Ring

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I love my new ring. Jon and Chrissy were very helpful in designing to create wonderful memories everytime I glance at it. Jon showed us the steps he performed to cut the stone. Chrissy was very helpful in creating the perfect ring to match the stone. Very satisfied with every element of this purchase. Thank you for creating such a wonderful memory.


Brandon on March 15th, 2018

Precision cut 5.6ct Flame Fusion Padparadscha Sapphire

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Jon and Chrissy did a fantastic job. They found the perfect chain and pendant setting for this beautifully cut stone and stayed in communication with me throughout the process. My wife loves it – we highly recommend purchasing from them and will continue to do so ourselves in the not-so-distant future!


Marina on April 14th, 2018

Precision cut 1.5ct Oregon Sunstone Necklace

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I was so happy that the gem I picked out was about to be made into a necklace. Communication was great, the whole transaction was timely. It looked so good in person and I will return in the future. Plus I loved the informational card that came with my necklace. So much thought went into this and I couldn’t be happier!


Marina on April 14th, 2018

Precision cut 2.8ct Rhodolite Garnet Necklace

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I was so happy that the gem I picked out was about to be made into a necklace. Communication was great, the whole transaction was timely. It looked so good in person and I will return in the future. Plus I loved the informational card that came with my necklace. So much thought went into this and I couldn’t be happier!


Yoshie on March 10th, 2018

Precision cut 2.0ct Dark Blue/Green Parti Sapphire

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Totally mesmerized. I cannot explain how much I'm satisfied with the item and the seller!


Yoshie on March 10th, 2018

Precision cut 1.0ct Colorado Topaz

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Beautiful stone, beautifully cut and beautifully packed. Way beyond two thumbs up.


Ian on December 3rd, 2017

Precision cut 10.5ct Blue Flame Fusion Spinel

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I also had a request to find a setting for the wonderful cut gemstone. I wanted to give something special for my girlfriend birthday. Jon was very helpful in having it set and place it as a beautiful necklace. My girl loved it and I can’t describe how pleased with the results. Hopefully, I can get another stone from Jon and it will be a ring instead.


Amy on October 13th, 2017

Precision cut 2.0ct Hessonite Garnet

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I am beyond happy with this stone. Jon was extremely helpful, prompt, and was happy to answer all of my questions. The stone shipped quickly and was well packaged. It was even lovelier in person than the photographs. I cannot recommend this shop more. 


Josephine on September 25th, 2017

Precision cut 1.8ct Morganite

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Beautiful stone, fast delivery and great communication!

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