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.


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

  • Taylor and Brian Shanfeld Avatar

    Erin K. @ Diamond Reserve is fantastic.
    Super responsive, helpful… she and her team design BEAUTIFUL pieces…. my (now never ending) Birthday/All holiday “wish list” is full ;)!

    Taylor and Brian Shanfeld 9/21/2021
    Libby Paplow Avatar

    My fiance worked with Kayleigh to design my engagement ring in April and I love it! Naturally we came back to Diamond Reserve to design our wedding bands for our upcoming wedding and Erin was equally great to work with. They are quick to get back to us and very easy to work with. We highly recommend them!

    Libby Paplow 8/31/2021
  • Joshua Wallace Avatar

    Kaeleigh and Erin are both really easy to work with. They made the process of getting both the engagement ring and our wedding bands really easy. I appreciated the option to do virtual sessions at first to talk about what we were looking for and learn about the next steps. Our custom engagement ring turned out amazingly and I can't wait to get our wedding bands!

    Joshua Wallace 8/31/2021
    Reza Zahedi Avatar

    Kaeleigh and the Diamond Reserve were recommended to me by a friend when I was looking for an engagement ring and the referral came with high praise which was well deserved. She is honest, experienced, knowledgeable, and loves her job. We went back for our wedding rings and will continue to reach out to her if we need more jewelry in the future. I highly recommend them!

    Reza Zahedi 8/19/2021
  • Olivia Moore Avatar

    I had a great time working with the team on my rings. Everyone in the office is so friendly. They created exactly what I wanted. There was a great selection of stones to choose from. I hope to use them in the future for any other jewelry needs.

    Olivia Moore 7/26/2021
    Marcus Fisher Avatar

    I got my fiance's engagement ring and wedding band here. Erin was great to work with and was always quick to respond and follow up with me. The ring renderings are incredibly helpful and really make you feel comfortable with the design before moving forward with the actual creation.

    Marcus Fisher 7/16/2021
  • Craig Lizotte Avatar

    Kaeleigh was awesome to work with. She helped guide me through not only the engagement ring process but also our wedding bands. Her communication was always prompt. Best of all the rings that she and her team put together are amazing.

    Craig Lizotte 7/09/2021
    Brett Finkelstein Avatar

    Kaeleigh and the team are exceptional! Have worked with them for both an engagement ring and wedding bands. They make the experience fun and easy! Would not go anywhere else!

    Brett Finkelstein 7/07/2021
  • Shelby Behr Avatar

    We had a great experience at The Diamond Reserve! My fiancé got my engagement ring made here, which I absolutely love. We came back to pick out our wedding bands as well and everyone was super nice and helpful. Highly recommend!

    Shelby Behr 6/28/2021
    Allison Duni Avatar

    I highly recommend working with The Diamond Reserve. Kaeleigh’s expertise is exemplary! She walked us through the whole process from ring design to achieving the engagement ring of my dreams! The process was transparent, efficient, and professional. I would definitely seek out their services for all my future jewelry and Diamond needs!

    Allison Duni 6/23/2021
  • Luke Mollnow Avatar

    Excellent group that makes your vision of the ring custom here local in Denver. The ring is premium quality and we could not be more happy with the engagement ring. We are going back to get the wedding bands from The Diamond Reserve as well.

    Luke Mollnow 5/22/2021
    Sarah Hensley Avatar

    Working with Kaeleigh at the Diamond reserve was such an amazing experience. She is super personable and friendly. We made both my wedding bands, my engagement ring, and my fiancé’s wedding band here. All of our rings were beautiful and quality work! We trusted them with our family heirloom diamonds and the setting they suggested turned out beautiful. I will always recommend them to family and friends!

    Sarah Hensley 5/14/2021

Diamond Reserve Couples