Quote Originally Posted by adrspach View Post
If you do not want to put your blade to it Henk showed me his testing way of unknown rocks. He uses old tea spoon which is realy easy repolish between tests.
I use the ol' spoon test too. You've started something that has had me going for a while too, I have geological surveys of Newfoundland all over the place! Best I've found is some purple slate near Twillingate Newfoundland, Very good finisher!

Good luck on your hunt, have fun climbing around the woods picking up rocks and getting strange looks when you rub them with spoons...