On July 20, 2020, the start-up of stone casting production took place on the site of the 9th workshop of UNICOM LLC. The first batch of heat-resistant stone tiles was produced. The tiles passed all the tests for heat resistance, acid resistance and wear resistance. The heat resistance was fixed by 43 thermocycles with the norm of 20 thermocycles. Basalt tiles of European and Chinese manufacturers do not withstand even one, immediately collapses.