De Koch Diamonds

De Koch (non-capitalized: de Koch; also deKoch) is a jeweller from Grand Theft Auto: San Andreas, Grand Theft Auto IV and Grand Theft Auto: Chinatown Wars that specialises in diamonds. The brand is advertised on the radio and on billboards in GTA: San Andreas but it is not found in San Andreas as a business, although the business address on the billboards read: Dix Road, Los Santos. In GTA IV, de Koch has several shops, especially around Algonquin.