CM-A engineering ceramic is an inorganic nonmetallic substance that form by chemically bonding of mica and micrite in crystallizing phase .
This material is in pure white colour, it have high mechanical strength, good dielectric properties, thermal properties, and chemically stable. it have good machining ability, that high precision machining can be achieved without using special tool and equipment , Turnaround of a machinable ceramic component can therefore be relatively fast, however, this ceramics is relatively weaker in wear abrasion and other mechanical properties as compared with other engineered ceramics.