It`s made from periclasite,magnesite aluminium spinel,chrome ore as raw material.

以方镁、镁铝尖晶、为主晶相的中性耐火制。

Sometimes the composition mineral besides the antigorite and the chrysotile, contains the few dolomite, the magnesite, the tremolite and the olivine and so on.

组成物除叶和外，有时含少量的白云、菱镁、透闪和橄榄等。