Staurolite mineral breakdown?
Iv been on the look out for an inert substrate cap and after a trip to my local sandblasting supply store Iv discovered a product called staurolite. I asked the receptionist for a copy of the MSD sheet. Now from what I can understand in my limited knowledge of the mineral make up of the rock it seems like a viable option as a substrate cap being it a cheaper alternative than garnet.
Can anyone identify this rock or if the msds suggest that it may be toxic?
Or has anyone used it with success/failure?