We are supplier of natural asphalt named Gilsonite which is brand name of American Gilsonite company and found by Gilson in city of Utah Basin and called Gilsonite on 150 years ago.It is also called Uintaite , Asphaltite and all are black, lustrous variety of asphalt occurring naturally on a large scale in the Uintah basin of eastern Utah and western Colorado.The same material is available in other countries.Gilsonite mine availble in Turkey and they call BITUMKAYA and in Indonesia called Batum. It has a molecular weight of about 1500, a softening temperature which varies from 200 to 450 F., depending upon the gilsonite vein from which it is taken, and is composed of about 86% carbon, 11% hydrogen and 3% nitrogen.