A lot, although not all, of the smoky quartz on the market has been created or “enhanced” through radiation. I found several sites describing this, but this eBay review was the only one I could find with photos of irradiated and natural pieces side-by-side (about halfway down the page). Generally, a very dark or very consistent color indicates an irradiated piece. Also, when looking at a raw crystal, a white base would indicate that it was altered – milky quartz won’t change color.
Apparently, irradiated smoky quartz is somewhat less common than baked citrine, since natural smoky quartz is not nearly as rare as natural citrine. Still, it could be hard to know what you’re getting, especially if you like to buy cut and polished pieces.
Also, it seems there’s been an important advance in the realm of the Naga Eye Amulets – carve them into a more graphical representation of a penis and claim that they are an ancient “Indus civilization” artifact, and people will actually bid on them – up to 7 bids and $127.50 at this writing. If the quartz one seems a little rich for your blood, here’s the leaded glass version starting at just $24.99.
If you don’t want quite such a blatantly phallic item, and would rather get a plain ol’ Chinese glass “crystal” point, there are plenty available – but it looks like you might get outbid on those beauties, too.