Many of the world’s most famous diamonds have been owned, cut and sold by the Baumgolds. Included in these treasures are the Earth Star (111.59 ct.), thought to be the largest fancy brown diamond in the world, and the Flaming Star (18.52 ct., E Color, Flawless) thought to be unique because in normal light it is the finest white color but under ultraviolet light it glows a very intense and brilliant orange. Both of these diamonds have been on display at the American Museum of Natural History. The Baumgolds also cut, designed and sold the Victoria Transvaal Diamond (69.89 ct.) which is on display in the permanent collection of the Smithsonian.
In 1968, Joe’s son, Buzz Baumgold, graduated from Columbia and joined his father in business. Buzz was the consummate salesman and grew the business to include the first American Express diamond sales promotion. After closing the factory, Buzz Baumgold changed directions slightly and became a Fifth Avenue private jeweler specializing in diamonds, colored stones, estate jewelry and custom design.