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

以方镁、镁铝、铬矿为主相的中性耐火制。

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

组成矿物除叶蛇和纤蛇，有时含少量的白云、菱镁矿、透闪和橄榄等。