Klox,
PCD or polycrystalline diamond is used for cutting tools, that have to cut very hard materials, ie rock or more commonly hardened steel, we use PCD tipped inserts on our lathe to turn hardened metals. I'm sure that's just the tip of the iceberg, maybe someone else can elaborate more. The PCD we are trying to cut is bonded to Tungsten carbide and they are removable inserts for a rock drill. BTW I've sent "chikara" an e-mail.
Talk to you soon Mark...
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