comprised of a yarn 16 formed from inorganic volcanic rock additives and rayon as a result the fabric 10 consists solely of the inorganic yarn 16 and exhibits certain desired characteristics discussed below referring now to fig2 a system 18 for manufacturing the inorganic yarn 16 is depicted as shown the system 18 includes a furnace 20 the furnace 20 is preferably a cupola furnace and includes a chamber 22 formed by a sidewall 24 the chamber 22 is dimensioned to receive the raw materials 26 needed to manufacture the inorganic yarn specifically the raw materials 26 include black rock 28 and an additive 30 as indicated the black rock 28 and additive 30 are provided to the chamber 22 in the form of crushed solids once they are received in the chamber 22 they are liquefied therein to form a melt 32 downstream of the furnace 20 the system 18 includes a spinning device 34 the spinning device 34 may be integral with the furnace 20 or it may be connected directly to the furnace 20 for receiving the melt 32 alternatively the melt 32 may be delivered to the spinning device 34 via a carrier such as a ladle or the like in either case the spinning device 34 includes a pump or other means to.