As part of the Huanghe Whirlwind family we represent a company that”makes it all” in terms of the production of synthetic diamond, PCD, and diamond tool production, all encompassed in one source. Founded in 1979 as a partnership of the Huanghe Group, A. L. M.T Osaka Diamond(Japan), Research Institute for Abrasives and Grinding and 27 subsidiary companies. Huanghe Whirlwind is the world’s largest manufacturer of synthetic diamond, PCD, and diamond tools.