Polycrystalline Diamond Paste

The polycrystalline is typically used on hard to polish materials such as ceramics, tool steels, sapphire, and super alloys.
It has more facets or cutting edges and keeps its cutting ability by being less friable (easily crumbled or pulverized) than the more common and less costly monocrystalline diamonds.

Monocrystalline diamonds tend to have longer, sharper edges and are more suitable for less hard materials such as brass or soft steel.

Polycrystalline diamond is somewhat spherical in shape and it has a greater number of cutting facets than monocrystalline diamond, therefore reducing subsurface deformation, giving more precise results when surfaces are etched.