u/Old-Internal3514

Got some high quality #4 that I plan to sniff. It’s straight rock off the brick so I’m looking for some good (and easily accessible) methods for crushing the rock(s) into powder?

Once I get the rock into powder I always dump out my dose on a glass surface and crush that into fine powder using a large packing knife razor. But I’m struggling to find an efficient method to get the solid rock into an initial powder without losing any.

Any tips/tricks greatly appreciated. Happy nods!