Our Story
Three generations. 200+ jewelry stores. One family that imports its own diamonds.
Richard Mark
President · Cool Blue Diamond
Cool Blue Diamond is a division of The Charles A. Mark Co., a family business that has been part of the diamond industry for over three generations. What started as a wholesale diamond supplier to jewelry stores across the Midwest has evolved into something more — a direct-to-consumer operation that brings genuine wholesale pricing to everyday buyers.
Led by Richard Mark, President, Cool Blue Diamond imports diamonds directly from international sources. This means when you buy from us, you're buying at the same prices that jewelry stores pay — often even lower.
Richard believes that buying a diamond should be an exciting experience, not a stressful one. That's why every consultation is personal, transparent, and completely free of pressure. He'll walk you through every detail, answer every question, and make sure you feel confident in your purchase.
Lowest price, guaranteed. Zero pressure. Richard picks up the phone himself.
So — why wouldn't you call?
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Why Us
The Cool Blue Diamond Difference
Here's why buying from us is unlike any jewelry store experience.
Direct Diamond Importing
We source diamonds directly from international markets, cutting out the middlemen that inflate retail prices.
Guaranteed Lowest Price
Because we import directly, we guarantee the absolute lowest pricing on every diamond we sell.
Personalized Service
One-on-one consultations with Richard himself. No sales floor pressure, no commissioned salespeople.
Three Generations of Trust
The Mark family has been in the diamond business for over 75 years, supplying 200+ jewelry stores across the Midwest.
Let's find your perfect diamond.
Whether it's an engagement ring, wedding band, or custom piece — Richard is here to help you find exactly what you're looking for at a price you won't believe.