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Originally posted by mysteriousmysteries
Very interesting. At first I didn't see it, but the longer I looked the more uncanny it seemed.
If the article is correct, this could be yet another of the thousands of unexplained artifacts from around the world which seem to defy current understanding of technological development through history, eg. ancient batteries etc.
Originally posted by Blaine91555
That looks like it may have been done with a powered engraver to me. It has that look to it and I've done a little stone carving and experimented with many methods over the years. The one I have now spins as it chips and it leaves lines just like that. Like you, I've a lot of experience working with stones having grown up with a Rock Shop in our basement, built multiple mineral / crystal / gemstone collections and taken many semesters of various courses in Geology in the 1970's.
Old is something it's not IMO also.
Hand work would look nothing like that.