Yes exactly what @albert said: you need to see if a strong magnet is attracted to it and then determine the specific gravity. Here is an old post that talks more about this:
http://goccf.com/t/397629
http://goccf.com/t/397629
"If you climb a good tree, you get a push."
-----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed."
-----King Adz
-----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed."
-----King Adz





















