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Record winning piece of coal, at Jinhua National Mine Park in Datong, on Nov 21. [Photo/dtnews.cn]

The Jinhua National Mine Park's Coal Museum, in the city of Datong, Shanxi province, has gotten a Guinness World Record for one of its more interesting exhibits -- the largest piece of coal ever mined -- with a weighing of 12.8 tons, Datong Daily reported on Nov 22.

Guinness certificate for the massive piece of coal, on Nov 21. [Photo/dtnews.cn]

The Guinness Shanghai branch issued the certificate of authentication to the mine park after listing in its records.

This piece of coal contains the largest amount of heat in one rock, averaging 7,000 calories per kilogram, and is from the Jurassic period, dating back 140 million years. It was dug from a spot 300 meters down.