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what is this ?
saw this while wandering around bowl of fire in lake mead. thought at first glance a lithic, but a closer look and it seemed to "flaky" for a rock, even though it is "rock hard". then thought maybe it was a tooth ? the edges are awfully serrated, to serrated to be any natural weathering. any ideas ?
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Hard to tell from the picture, but it looks similar to white opal I've picked up outside of Milford.
I googled white opal and this was the best looking image of the type of rocks we were finding.