mick...everything that glitters is not gold...usually its chalcopyrite...your first lesson from the professorPotbelly, How could you.
You know Dave and I, has a lot of experience in hard rock mining and placer. So why didn't he call it for what the gold in the pic is. Crystalline Gold in Quarts. Follows the same structure as any crystalline metals. That just shows you the Professor is deceptive in his opinion.
Wrmickel1