black tourmaline schorl used in radio industry, jewelry, filter, health care, etc size: 10-20mesh 20- ... Place of Origin: Hebei, ChinaBrand name: K.D.H.Application: radio industry, jewelry, filter, health care, etcCategory: cyclosilicateSize: 10-20mesh 20 ... as necklace bracelet and so on.2. It can be used in deodorizing wall paper, floorboard, ceiling board furniture inner wall ...