Those look like super abrasives(lavina) metals or coppers.
Not sure they make a copper bond.
They probably do-you can call super abrasive in the Atlanta office.
They make quality metals- 

On Thu, Mar 5, 2015 at 12:31 PM, Pat Staples <cpstaples@msn.com> wrote:

Sorry Pictures didn't come out first time
Anybody have any idea where I can find copper diamonds, 120 220 400 800 grit
 
Thank you
Carl Staples
Classic Marble & Stone Restoration
610-356-4100
www.marblerestore.com
 
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