Originally Posted by
Oscroft
A lot of coticules have what appear to be cracks in them, but in most cases they're from when the sediment was laid down and they've been filled with inclusions and can't be felt - I have one with several "crack" lines that look like the one in that auction, and it's just fine.
There is a dip in the surface and it's going to take some lapping to get it flat, but there will still be plenty of coticule thickness left.