Koop Diamond Cutters, Inc.

214 East Eight Street, Cincinnati, OH 45202

Phone: (513) 621-2838

Hours: Monday thru Friday 8 a.m. - 4 p.m.

We offer appointments on select Saturdays only.


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At Koop Diamond Cutters, we employ the skilled craftsmen and modern technology needed to handle any project. We can assist you with any of the following needs:


Jewelry Repair and Restoration; Ring Sizing; Half Shanks; Full Shanks; Adjustable Shanks; Polishing & Cleaning; Chain Repair; Clasp Replacement; Charm Attachments; Bail Repair & Replacement; Rhodium Plating; Prong Tipping; Prong Head Replacement; Gemstone Replacement; Gemstone Cutting & Polishing; Jewelry Inspection; Koop Custom Design: 3D CAD Modeling; Hand Carved Wax Models; Fine Metal Casting; Machine Engraving; Estate Jewelry Acquisition; GIA Certified Gemologist Appraisals


Other Services we offer through trusted affiliates: Watch Service; Hand Engraving; Pearl Stringing