uhm, uh, like what kind of crystal? what size? how thick? why a
’slab’? slabbing is simply cutting material into pieces from 4mm to
about 6mm for ‘thin slabs’ & more for ‘thick slabs’. usually crystals
make better specimen intact than they do cut up; the more transparent
crystals are faceted & the less transparent are cabbed (cabochons).
if you can’t talk them out of it contact one of your local lapidary
clubs - look in the sunday paper under 'clubs, activities, etc.'
there will be someone in one of them who can do ‘slabbing’ -