Here's my latest buy from eBay. I'm not sure how common it is to have such a distinct swirling pattern in these. The price guide seems to say that the swirling is found as another color mixed in - green blue, pink, yellow, purple and caramel. In this one, though, unless I'm not seeing it right, the swirls are not a separate color, but are white with varying opacity making a sort of light white/dark white pattern. I probably paid too much for it, but I just thought it was too cool. Can someone tell me how common this might be?

This picture is taken with just an overcast daylight coming through the window.