Zirconia diamond is a high temperature synthetic cut stone made from Zirconia by Russian scientist in 1975. JOHNCERA Cerami Core Grinding is also made from zirconium oxide, one of the highest quality ceramic materials which is second to diamond in hardness. Due to the advantage of cerami core grinding, such as sharp for ever, avoid the stain from juice of food, corrosion resistant, no metallic taste and smell and so on, JOHNCERA Cerami Core Grinding is very popular in home and foreign market.
