[jimmontg]

Trugrit has an AO 2x72 belt at 2000 grit too. The high grit belts are on the last pages of the 9 pages of 2x72 belts they have. They also have some 1200-2500- 3000 grit Norax wet dry belts too, AO. They are 7.50 each. says not to use excessive water, so diamond isn't necessary unless you are going to polish ruby, or sapphire which are made of Aluminum Oxide, only diamond is harder. Actually you can polish sapphire, but the belts would wear out faster. I used to collect gemstones and know a thing or two about them.