The First Polishing Process
It is believed that the first diamond polishing (grinding) process took place in India in the seventeenth century, using a large wheel (or scaife) powered by four men. Reputedly, a treadle-driven pewter wheel was used to polish a stone. The man-power on the wheels was first replaced by donkeys or horses, then by steam engines in the nineteenth century. Today all diamond cutting benches are powered by electric motors.