About Us

Formerly Bernie Helmicks Diamonds and Gold, CDI Diamonds & Jewelry is Columbus’ best kept secret. After serving retailers in the Tri State area for over 30 years, we are now open to the public, offering unbeatable prices to all of Columbus. We guarantee that we can meet any budget! Our long list of international diamond contacts helps us guarantee the lowest prices on all loose diamonds, both certified and non-certified. We also offer competitive pricing on all engagement rings in stock and special orders.

Not only are we family owned and operated, but our entire staff is GIA educated, with our own in house graduate gemologist.

We offer our customers a very discreet, comfortable, no pressure buying experience.


CDI is licensed by the State of Ohio to purchase diamonds and gold, they are also members of The Dublin Chamber of Commerce as well as Jewelers of America.


We Specialize In

• Certified Loose Diamonds (in all shapes, sizes and qualities)
• Designer Engagement Rings
• Wedding Bands
• Fashion Jewelry
• Bridal Party Gifts
• Custom Jewelry Design
• Expert Jewelry Repair
• Purchasing of Unwanted Gold & Diamonds

• Appraisals