Supply: The primary ore of germanium is germanite, that's about 7% germanium. Commercially, germanium is acquired to be a byproduct of steel refining and from some coal ashes.Nghiên c?u c?a FDA ??a ra k?t lu?n r?ng germani, khi s? ??ng nh? là ch?t b? sung dinh d??ng, "th? Hello?n m?t s? nguy Hello?m ti?m tàng cho s?c kh?e con ng??i".[six]Just on