Gilsonite, Natural Bitumen WHAT IS Gilsonite is also called Natural Bitumen, Natural Asphalt, Asphaltum, Asphaltite? Gilsonite is our trademarked brand name for Pasargad Hakhamanesh Arshia.Group (PHA), a naturally occurring solid hydrocarbon used to enhance the performance of critical applicators across multiple industries, including oil and gas, ink, paint, construction, asphalt and foundry.This unique mineral is used in more than 160 products, primarily in dark-colored printing inks and paints, oil well drilling muds and cements, asphalt modifiers, foundry sand additives,...