The ceramic balls are newly synthesized by companies. The bearings that formed with ceramics are most durable and have many strengths. These bearings have many qualities and are superior to steel balls because they are not rusted, have heat resistance, reduce friction, and are super smooth.
Although these are super excellent, they are also expensive as compared to steel. But one time you pay for them, and then you will have no need to overspend on them over and over again.