Hi all,

I bought some iffy lathe tool of Ebay; the seller claims it to be
tungsten carbide, but I'm sceptical about that. Looks more like HSS or
chrome/moly to me. I need to ascertain if it's genuine TC or not. So...
how about trying to grind it on an ordinary grey stone grinding wheel? It
should be invincible against grey wheels, should it not? So if I end up
with a bit of the tool ground off, then it can't be TC, can it? Will that
be definitive proof or has anyone got a better suggestion?

ta.