Our offices are open for private diamond viewing and consultations. We are also offering virtual consultations.

The Diamond Reserve is Colorado’s most trusted custom jeweler. We specialize in the most brilliant engagement rings, GIA-Certified loose diamonds, and custom jewelry. Unlike retailers, owner Kaeleigh will meet with you one-on-one for personalized diamond consultation.

The Process

At The Diamond Reserve, we create custom engagement rings while providing our clients with one-on-one service and transparent expert diamond education.

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We educate each and every one of our clients on the 4C’s of diamonds and more. It is our mission for you to feel educated and confident when selecting your diamond.

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Our team will guide you in selecting the diamond or gemstone that fits your needs and budget, answering all of your questions, and making sure you get the best price.

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Once you have approved the 3D renderings our bench man begins to make the magic! All our engagement rings are handmade right here in Colorado to the finest quality. 

Questions? Let's talk!

Loose diamonds

Diamond Education

Start getting educated on diamond quality and terminology before booking your private appointment.

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Engagement Ring Inspiration

Follow us on Instagram to see our latest designs and get inspired.

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Why The Diamond Reserve?

See what makes The Diamond Reserve experience unparalleled to the retailers.

Kaeleigh Testwuide


I am Kaeleigh Testwuide, founder and diamond expert at The Diamond Reserve. Thank you so much for visiting with us! My number one goal is to get you educated on all the dos and don’ts of buying a diamond, making sure you get the best diamond for the best value! 

There is so much information out there regarding diamonds and a lot of mistrust when buying a diamond. At The Diamond Reserve we will give you the truth, answer all of your questions, and ensure that you feel confident when you select a diamond. Buying a diamond and an engagement ring does not need to be stressful, it should be fun and exciting, and that is exactly how it feels when you work with us. 

Are you thinking about popping THE question, upgrading your diamond, redesigning your setting, or looking for a special gift? Send me an email and I will work with you personally to make sure we send you off feeling confident and excited with your purchase!

Yours Truly,

Kaeleigh Testwuide

Who's Talking About Us

  • Jade Darrough Avatar

    Best jeweler in Denver!
    The Diamond Reserve made our dream, custom engagement ring come to life! It was no question that we'd create our wedding bands with them as well. They are kind, professional and incredibly talented. Look no further 😊

    Jade Darrough 4/13/2021
    Jason Lee Avatar

    My fiance and I had a great time working with Erin. I appreciate the amount of patience and peaceful experience she has given us. It was a very nice experience looking at different rings with my fiance, and Erin helped us grasp that enjoyable moment, as we move forward with our wedding planning. I encourage others to look into this place, and hopefully see why we didn't have the need to look elsewhere.

    Jason Lee 3/13/2021
  • Chris Norton Avatar

    Erin and Kaeleigh were absolutely incredible with their consultation and delivery of a flawless engagement ring. They know how to deliver the perfect product and can make your unspoken vision a reality. Thoroughly impressed and so happy we found them and will also be seeking out their assistance and expertise with our wedding bands! -Chris and Julie

    Chris Norton 2/16/2021
    Madison Wendl Avatar

    SO HAPPY we went through Diamond Reserve! Was such a great experience. I LOVE LOVE LOVE LOVE my ring and was very happy that she gave my fiance expert advice on choosing the perfect ring for me!

    Madison Wendl 1/20/2021
  • Ben Cornella Avatar

    Had the pleasure to work with Erin in designing a custom engagement ring that incorporated diamonds from a wedding ring gifted by my Grandmother. It was a pleasure to work with Erin and the Diamond Reserve. They are extremely professional and very timely. They were also able to work within a budget. I would highly recommend them to anyone

    Ben Cornella 1/18/2021
    Audrey Extine Avatar

    I am so glad I went to The Diamond Reserve! Kaeleigh is extremely knowledgeable and made my experience picking out an engagement ring very enjoyable and stress free. Can't wait to see how our wedding bands come out because she did an amazing job customizing my fiance's engagement ring! Will recommend to anyone who is looking for the perfect ring for their loved one.

    Audrey Extine 1/16/2021
  • Colin Fatti Avatar

    Kaeleigh and Erin helped me design the most STUNNING earrings for my wife as a push present. The pricing was unbelievable, the service was 5 star white glove. Cant thank them enough for helping me in a pinch. My wife was over the moon. If you are looking for anything in regards to diamonds or jewelry, look no more, these are your girls.

    Colin Fatti 1/07/2021
    Kelsey Schroeder Avatar

    Kaeleigh and Erin were wonderful to work with! We did everything virtually since we live in Iowa and they made it so easy. I love my ring and highly recommend them 🙂

    Kelsey Schroeder 12/22/2020
  • Stephen Massi Avatar

    Erin was an absolutely pleasure to work with and completely made my fiancés dream ring become a reality.

    Furthermore, they were willing to work with our budget, which was not as much as people think based on the ring, and still give us that incredible look. I honestly could not be any happier with the quality of the ring or amazing service, plus now I know a little bit about diamonds.

    Thank you!

    Stephen Massi 12/21/2020
    Taylor Martin Avatar

    Can't recommend the Diamond Reserve enough! Erin was fantastic to work with. She was very helpful throughout the ring design process, and rolled with all our changes to provide a beautiful ring that my fiancée absolutely loved!

    Taylor Martin 12/17/2020
  • Jennifer Youngman Avatar

    Erin is wonderful! I had a family diamond passed down and felt overwhelmed with the process of creating my own ring prior to visiting The Diamond Reserve. She made the process of creating my perfect ring too easy!! Couldn’t recommend this gem of a place more!

    Jennifer Youngman 12/17/2020
    Lauren Avatar

    Really impressed with the Diamond Reserve. It was really cool to have a personalized diamond shopping experience with just us and Kaeleigh - so different from your average jewelry store. She taught us so much about diamonds and definitely knows her stuff. I am so happy with my ring! It's just perfect.

    Lauren 12/12/2020

Diamond Reserve Couples