Tlhaloso: Lejoe la seretse se chesang le tsejoang ka hore ke pumice kapa porous basalt, ke mofuta oa thepa e sebetsang le ea tikoloho.E na le liminerale tse ngata le li-microelements, tse kang sodium, magnesium, aluminium, silicon, calcium, titanium, manganese, tšepe, nickel, cobalt le molybdenum joalo-joalo ...
Bala haholoanyane