Another thing: sometimes I think it's worth it to lightly chamfer the edges of a stone before lapping it. IMO this helps to prevent breakage at the edges.
Then when you're done lapping you can chamfer the edges properly.
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Another thing: sometimes I think it's worth it to lightly chamfer the edges of a stone before lapping it. IMO this helps to prevent breakage at the edges.
Then when you're done lapping you can chamfer the edges properly.
How many laps are you doing on the coticule? With water?