From cutting, to design and through to the manufacturing of custom jewelry, Koop Diamond Cutters does it all from the fourth floor of the Queen City Building in downtown Cincinnati. Cincinnati native Clarence Koop started the business in 1966, and soon after, his son Butch began designing jewelry pieces on an order-by-order basis. Now in its third generation of family ownership, Koop now has a full manufacturing plant and sales center to provide customers with a complete, in-house shopping experience.
214 East Eight Street
Cincinnati, Ohio 45202