MK Diamond MK-1000 Saber MK Diamond Ultra-thin lapidary diamond blades are made of stainless steel, this Saber blade conserves gem materials and holds waste to a minimum. This makes it an ideal choice for such precious materials as sapphire, jade, ruby and opal. The Saber blade cuts at twice the speed of ordinary lapidary blades. The Ultra thin rim cuts with little chipping and leaves a remarkably smooth surface requiring less polishing time. A great MK Diamond diamond blade!