Weighing 25,590 kilogram, the world’s largest native copper nugget is believed to form some 1 billion years ago.
The copper was first excavated in the U.S. state of Michigan in 1997.
It traveled more than 12,000 km in three months from Michigan to China for a display on an expo.
SOUNDBITE(ENGLISH)GRAHAM SUTTON, Manager of Chinese office of Collector’s Edge
“The native copper from this part of Michigan is very famous. No place in the world has bigger piece of copper, and over 100 years of mining, they never found one of this big. The next biggest copper is only 10 tons, so it’s more than two times bigger than any other found in more than 100 years.
The precious item was collected by the US-based Collector’s Edge, the world’s premier source for exquisite and collector-quality mineral specimens, in early 2016.
Starting from Thursday, the five-day event has attracted hundreds of dealers from both home and abroad to bring treasures of world class.
The annual show is the largest platform for mineral and gemstone trading in Asia.