Those seven ratnas (precious and unique objects) of the Cakravartī (universal sovereign), which are the earth-bodied beings belonging to the category of one-sensed beings and are produced from the transformations of their bodies; e.g., the Cakraratna (Cakravarti's discus, which is a ratna) and the like.
cakrādīni sapta ekendriyāṇi pṛthivīpariṇāmarūpāṇi.
(PrasāVṛ Pa 351)