Trace Metal Content of Gilsonite® Resin
| Element | Percentage |
| Manganese Copper Zinc Cobalt Nickel Chromium Thallium Barium Selenium Bismuth Antimony Beryllium Mercury Lead Cadmium Arsenic | <0.0008% <0.0008% <0.0004% 0.004% 0.004% <0.0008% <0.001% <0.002% <0.04% <0.008% <0.008% <0.0008% 0.004 ppm 0.8 ppm <0.4 ppm <4.0 ppm |