Searching for a reliable saw and lap for cutting polished gem sections

I am looking to purchase a small gem/ mineral saw 4- 6 inch diameter blade with a vice for holding sample and stone ‘feed’ system, secondly a polishing lap that I could use to polish gem sections (for research) with two parralel faces. Any recommendations of suitable suppliers manufactures and possible attachments

many thanks in anticipation

Try JS Gems
They have a good selection of Diamond Pacific as well as Covington
You could also try High Tech and Diamond Tech
Good luck