April 25, 2005
Henry Grossbard Dies at 79
Henry Grossbard, founder of RCDC Corp. and developer of the radiant-cut diamond, was struck by a car and killed April 23, in Hoboken, NJ. He was 79.
Grossbard was born in Vienna, Austria, and came to the United States during World War II. He apprenticed with a diamantaire in New York City and became a master diamond cutter, according to his son, Stanley Grossbard. He developed the radiant cut in 1976, and it has become a well-known rectangular diamond shape. Grossbard's innovation was to take a traditional emerald-cut shape, which couldn't produce brilliance to the same degree as a round cut, and cut it so that it had the sparkle of a brilliant-cut diamond.
Prior to Grossbard's development of the radiant cut, all diamonds with straight edges, like the emerald cut, were faceted with long rectangular facets. This cutting style, called the step cut, results in a stone with a less brilliant appearance. Diamonds with rounded edges, like round stones, pear shapes, ovals and marquises, are faceted with triangular facets. This cutting style is known as the brilliant cut. By combining the two cutting styles into a hybrid "brilliantized step cut," Grossbard was able to release more brilliance in a straight edged diamond.
Grossbard received worldwide patents for the radiant cut design in 1977, among the first patents ever granted for a diamond cut. Though the patent has now expired, RCDC Corp. continues to sell its brand, the Original Radiant Cut, to jewelry stores throughout the U.S.
Grossbard is survived by his wife, Gertrude; son, Stanley; daughter, Rebecca; and grandchildren, Jacob and Alexander. His funeral will be held April 27, at 1:30 p.m. at Wein & Wein Funeral Home, Hackensack, NJ. The family asks that donations in his memory be made to the United Synagogue of Hoboken, 115 Park Ave, Hoboken, NJ 07030.
by Peggy Jo Donahue