Hi All,
 
A few days back Robert Cucchiara and Frank Prochaska expressed interest
in knowing where to find diamond files for field testing of specimens.  Nolan
Supply is the best source I've found:
 
 
Just click on "Abrasives", and scroll down to "Stones and Abrasive Files".
Then click on "Norton Diamond Sharpening Stones".  These are terrific,
not that expensive, and made in the good old US of A.  I have a set of the
3 1/3" long ones (coarse, fine and extra fine), each of which is currently
on sale for $19.06.  Mine were about $16/ea when I bought them a year
and a half ago, and they still work fine (though my coarse stone is ready
to be replaced).  These are a nice size for field use.
 
Best,
Rob

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