Family-owned GASSAN Diamonds: more than brilliant

MASTERS COMPANY is MASTERS' official selection of the 300 'greatest companies' in the Netherlands. This is the business network where you do business and gives access to MASTERS HQ's unique multi-channel exposure. Masters Company GASSAN stands for diamonds, jewelry and luxury watches. For 75 years, the diamond dealer has provided craftsmanship, proven quality and reliability.Online Editor: Natasha Hendriks
Image: GASSAN

The four Cs

GASSAN is reliable and the official dealer of more than twenty of the world's most prestigious jewelry brands and more than sixty of the world's most exclusive watch brands. These various brands are sold in all GASSAN stores. Mix & match jewelry, Choices by DL and the unique 'more than brilliant' cut 'GASSAN 121' are both designed, developed and manufactured in-house.

In addition to diamond cutting, the core business today is to educate visitors from around the world about the famous four Cs (carat, color, clarity and cut) that together determine the final value of each diamond. GASSAN adds a fifth C, of confidence. They love to share their knowledge and passion by guiding their visitors around the magical world of diamonds. They offer the ultimate opportunity to personalize diamond jewelry by offering countless choices and options.

Family business

The company was founded shortly after the war by Samuel Gassan, in October 1945. GASSAN Diamonds imported and exported both rough and polished diamonds. It also traded color gemstones and diamond jewelry.

Samuel Gassan died at the age of 73 on July 4, 1982, and his grandsons Benno and Guy Leeser became the new owners of the company. Benno, married Kitty Leeser later that year. David Bijlsma, Kitty's son, joined GASSAN Schiphol in 1989. Benno and Kitty's daughter Debora Leeser joins GASSAN in 2005. Choices by DL, a unique and patented concept, is a creation of Debora Leeser.

MASTERS COMPANY 300

MASTERS COMPANY 300 is an exclusive business hub for members and provides access to the unique multichannel exposure of MASTERS HQ. The business network where you do business. A Masters Company is distinguished by quality, creativity and craftsmanship, an excellent reputation and a positive, forward-looking attitude. A company can only be nominated by a Masters Company or selected by the Masters Advisory Board. A Masters Company is always best in class and belongs to Holland's greatest companies. Do you think your company also belongs to MASTERS COMPANY 300? Mail your application and maybe you will soon belong to the best in class.