| vermiculite ore | 0.46 | But the primary form of asbestos at Libby is tremolite, which is a contaminant of the vermiculite ore. | ||
| vermiculite mine | 0.33 | MSHA is evaluating worker exposure to asbestos in vermiculite mines. | ||
| vermiculite product | 0.33 | The EPA has found asbestos in vermiculite garden products. |