I picked this up from a garage sale yesterday for $2 just because I was curious.
It was filthy when I found it but it's been cleaned and lapped now.
It consists of shades of light and darker browns.
It feels quite fine and smooth, and will generate some whitish slurry
Its 6" long, almost 2" wide and about an inch thick.
Just wondering what you guys think it is.
Thanks Grant

Dry
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Wet
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Slurry
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