Dura-Green DIA, a vitrified-bonded diamond abrasive designed for contouring porcelains and ceramic copings. Dura-Green DIA provides enhanced performance with a smoother, chip-resistant cut verses silicon carbide or diamond burs. Densely packed diamonds are embedded throughout (from the surface to the core) in a special glass binder offering extended cutting ability up to the last ounce of material. Dura-Green DIA stones are used for contouring zirconia porcelain and ceramics.