Thanks for the clarification Benjamin. So you are saying that red and yellow might come from one tree, and yellow and white from another, depending on age? I wasn't aware that the same tree doesn't produce all three colors of wood. I didn't get the information from Wikipedia, by the way. Instead, it comes from this post:
http://launch.dir.groups.yahoo.com/grou ... sage/18921As I said in my review, I can't know for certain whether the shell was made on a lathe. All I noticed were a few faint perfectly horizontal tool marks, such as you would get when turning a shell on a lathe. But, as you say, it's entirely possible for the marks to have come from the sanding. The marks are only visible if you look very closely, and in no way detract from the beauty of the shell. And, as I said, I have no problem with lathe-turned shells. I see no reason why you couldn't make them that way....
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