Thank you @Reno Chris, having alerted me sufficiently in the video on poisonous and toxic elements I question dry crushing and sifting the crushed rocks. Will a chain mill handle damp or slurry material in an effort to control the dust? I have ball milled material wet but I am not familiar with using a chain mill. I know from experience that asbestos is toxic because it is a durable respirable fiber that you can easily inhale, but simply wetting it greatly reduces the risk.