1.Products of good quality and competitive price 2. Punctual delivery and strict quality control 3.Natural Stones, Non treated Place of Origin: Hebei, ChinaBrand name: K.D.H.Application: radio industry, jewelry, filter, health care, etcCategory: cyclosilicateSize: 10-20mesh 20-40mesh 200mesh 325meshColor: Most commonly black, but can range from brown, violet, green, pink, or in a dual-colored ...