Posted by: CoinCoin Post Reply
10/21/2016, 18:52:47
More looking and clicking - they LOOK like ivory but SOUND like stone. Maybe a dumb question, but could they have been made of already petrified ivory, or could they have petrified since they were made? I have no idea whether this process occurs during the 5,000? or less years since they were shaped as beads. The Wikipedia article doesn't give time frames.
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