Well, yes and no. It depends on where you live. If you're in the desert then it's quite possible to find bottles that have turned dark purple like Sandchip's. Decades of extreme sunlight exposure will turn a bottle very dark purple, that's why you see insulators which are that deep purple which haven't been nuked, because they were up on the poles for that long. I've found deep purple shards in a mine tailing before, since trees were never overshadowing it for the last full century. But for an intact bottle to get that dark naturally is quite a stretch, it would have had to have been exposed to sunlight for basically the entirety of its existence.BottleCapKid said:The only bottles you will see with natural purple coloring with be a very very light purple. That comes from years of exposure from the sun. It turns that very light purple color over many decades. Some people speed up this process by nuking the bottle which will turn the bottle very dark purple. Basically if its a dark purple it has been nuked and if it has a very light purple tint it is probably natural coloring. Hopefully this helped, Shane