“Find Exactly What You Want for Tremendously Less!”
We are a Minnesota diamond importer / wholesaler who offers a unique opportunity. We sell custom diamond jewelry direct to the MN public at the same wholesale prices once only offered to diamond jewelry stores. Find a ring you like, and we can custom re-create it for less. This can be said for all styles of diamond jewelry such as bracelets, necklaces, pendants, and earrings!
Combine our diamond import prices with our extensive settings gallery, priced at near manufacturers cost, and we guarantee you will be blown away!
We are selling to the public at the same price that was once only offered to retail stores. CoolBlue Diamond is a division of Charles A Mark and Co., “a wholesale diamond company that has imported and supplied diamonds to the finest jewelry stores across MN & the Midwest for 75 years, spanning over 3 generations.”




Richard, Jenna and I couldn't be happier with the engagement and wedding rings you helped me with 3 years ago. Now My brother in-law is ring shopping and I told him he had to go to you. I would love for him to experience the same awesome service and product we received. What is the best way for him to get in touch with you? I still have you phone number but didn't want to pass it along without your permission. Thanks Again. I hope you and your family are well.
Hi Richard!