On July 7, local time, in Sverdlovsk region, Russia, the Russian National Technology Group discovered 4 emeralds with a total weight of 4.8 kg in the Mariinsk mining area, which is the largest gem of its kind in the past 20 years. . Image source: Visual China

Release time: 2020-07-08 07:35:14 [Editor: Li Peiyun]