These fragments of personal ornaments such as a jade ring excavated at a site (Dwelling Site No. 6, II-2 Section) in Samyang-dong of Jeju, and an ear ornament discovered at a site in Wolseong, Yongdam-dong of Jeju are believed to have been used as prestige items in the prehistoric period. The jade ring, made of nephrite, is similar to the Nangrang relics in terms of material and form. The glass ear ring. The glassed jade is mostly excavated in the Mahan sites in the southwestern part of the Korean peninsula. Therefore, it is believed that those ornaments were flowed into jeju from the korean peninsula. Both artifacts are the important evidence that the prehistoric settlers of jeju at that period directly participated in the interregional trade along the marine routes off the southwestern coast of the korean peninsula. In addition, it is that the island was introduced to new cultural achievement through the eastern trading routes that led it to the region's cultural hub in China.