I was watching X2 and thought about Ruby Quartz lenses. This reminded me of a funny story from 2006 that deals with the weird ways fakes can be construed as authentic, and then ultimately passed down to other collectors.
Before I start the story, and though it will become obvious, Member #1 = Seller and Member #2 = Buyer.
In 2006, Member #1 had custom Ruby Quartz lenses developed by a third party using the same techniques the movie lenses used (clear lens dyed deep red, rear mirror coating, front AR coating, etc.).
Member #1 wasn't satisfied with this lens and decided to sell it to Member #2. He told Member #2 it was a custom and nothing to do with Oakley.
Member #2 was very impressed with the lens (remember, this was 2006 when no one yet knew how to replicate the movie lens), so much so that he was convinced it was an Oakley lens even though Member #1 told him the origins of it.
Member #2 contacted the Oakley employee who made the originals and asked if they are Oakley lenses (all communication by e-mail). The Oakley employee, not knowing that anyone had even attempted to replicate the lens, told him it did look like a Ruby Quartz lens that Oakley developed.
Member #2 told Member #1 what the Oakley employee said and that he didn't realize what he had. Member #1 reiterated he knew exactly what he had since he had it developed from the ground up, and that there is no chance it was an Oakley lens. Member #2 didn't want to believe it and kept representing it as the real deal.
Eventually Member #2 sold the lens to someone else. Now another collector has a custom lens thinking its the real deal, and paid out of the ying yang for it.
Anyway, the moral of the story is that there are lots of fakes out there being represented as authentic. Sometimes its intentional, sometimes not. Those who are privy to background information know how rampant this is and protect themselves. Those who are newer should also know this and protect themselves as well.