... for gemstone: Last 5-10 times longer than diamond plated bur For dental lab,jewelry,lapidary,gemstone 5 grits. Technology:1. Consist of ... , jewelry, lapidary and gemstone.2. All burs are with HP shank, 3/32”, ISO104, shank diameter 2.35mm. Fit to ... glazePre-polish and fine finishSpecifications: 89 items for select HP shank 320 mesh fine grit dental lab sintered diamomd carving tools for gemstone