I had an 8th of grandaddy purp a couple months ago, I remember that stuff SMELLED! I've gotten a lot of purps and they all have a similar purp smell, thats usually how I tell if its actually purp.

Grandaddy doesnt have much purp on it at all, it was green with red hairs and dark purple spots but its hard to tell if the spots are actually purple because its so dark. It looks dank as fukk but the smell is a give away. Purp is almost always the smelliest stuff around. And it gets you high as fuck, purps like demon weed or something, lol, everytime my friends smoke purp they tripp tha fuck out, thinkin its laced for sure.