America Oil Field Service, LLCWe are producers of mineral Barite or Barium Sulphate BASO4 As inert mineral its is heavy mineral having a specific gravity of 4.2 .As owners and distributors to the usa market , we have our own mines, capacity to deliver 10,000 tons montlhy. We deliver to Laredo Texaswe offer 185 per ton.For more information , please contact Francisco Lerma at 956'635'60'11Francisco Lerma America Oil Field Service, LLC9803 sterling loop ste. 180Laredo, Texas 78045956 635 60 11