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The world's largest night-shining jewel, with a diameter of 1.6 meters and a weight of six tons, was shown to the public for the first time in the Palace of Valuable Jade in China's southern Hainan province, chinanews.com reported Sunday.
Zheng Baoshi, vice-president of the Jewelry Association of China, said experts estimate the night-shining jewel is worth 2.2 billion yuan ($331 million).
The night-shining jewel was discovered in an irregular shape, and the shaping process took three years, Zheng said.
A night-shining jewel shines brightly in a dark environment.
The palace displayed more than 200 pieces of natural artworks and gemstones, such as a stalactite in the shape of a spaceship, a fine jade resembling a sleeping beauty, and grotesque stones.