Method and machine for sorting precious stones and the like according to size

摘要

A method and a machine for sorting precious stones and the like according to size, wherein one or more stones are suitably positioned, separated by suitable devices (3, 4) and fed into a vibrating transparent tube (5) for feeding them between the transmitter and the receiver of at least one laser micrometric measurement device (11, 12) which delivers the measurement results to a programmable controller for comparing the results with standard results and actuating a mechanical device (14) for automatically sorting the stones on the basis of the results, then restating the measurement cycle.