YDI is a DTC Sightholder and is a longstanding key purchaser from all the major rough producers. YDI makes the most out of ea ... ch rough stone, manufacturing quality fine-make 0.005-2cts round diamonds at its state-of-the-art facilities in China and Israel. With over 65 years' experience, YDI has become a major manufacturer and supplier of polished diamonds to jewellery and watch industry leaders and retailers around the world. With offices in Tel Aviv, New York, Antwerp and Hong Kong, the YDI staff is dedicated to fulfilling your needs and exceeding your expectations, providing real transparency, real choice and real value around the clock. Equipped with an exceptional stock management system, YDI's extensive inventory has been sorted into over 1,500 narrowly-defined categories, each with its own simple Assortment Code so you can always select exactly the diamonds you want and keep your stocks at a minimum. read more