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Discussion Starter · #1 ·
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?
 

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