Windy, I noted Alan's Ravenswood long ago, and I have already considered the Ravenswood possibility in consultation with other collectors who have much more knowledge of the WV swirls than myself. The consensus is that mine are not Ravenswood, and as you can see from my photos, it does appear that ours are kin. A primary concern is the smearing of the blue present on our marbles as compared to Alan's. So given that, I continue to search for any examples from confirmed sources. And if I ever do get to the point where I have any confidence in an ID, I'll be sure to let you know - now that I know mine aren't the only ones on the planet . -Ric