Restoring Lapis Lazuli: Can Scratches Be Buffed Out?

Question
I have found some older lapis jewelry that I want to "recycle",but a couple of the lapis stones are scratched, Is it possible to buff out the scratches, or do I need more expertise?

Answer
Judy,

Lapis is a little tricky.  You need a flat lap charged with 14000 diamond powder and some crystal lube.  First you have to sand out the scratches using 600 grit sand paper on a belt or a disk.  I use flat disks for everthing.  After 600 use 1200 then the 14,000.

Other people may have other methods this is what works for me.

Regards,

Steven D.Covey