The price of fine nephrite, just natural stone, has climbed from 10,000 yuan a kilogram to at least 1 million in 10 years. Top-grade art work in Hetian jade? Possibly priceless. An exhibit of works such as this in Beijing ended this week. [Provided to China Daily]

Skyrocketing prices for the gem draw prospectors into the market in search of sudden wealth, Wei Tian reports in Urumqi.

For thousands of years, no gem in China has been given the same status and honor as jade.

It was used to make imperial seals in the ancient times, carved into gods or mythical wild animals to protect the wearer from misfortune, and more recently embedded into the gold medals for the Beijing Olympic Games in 2008.

Over the last decade, however, the gem has also become extremely popular with collectors - not for its representation of moderation and virtue, but for its skyrocketing price.

Jade dealer Wang Wenhua said that 10 years ago a natural stone would have sold for about 10,000 yuan a kilogram (more than $1,500 at today's exchange rate).

Today, that price would be at least 1 million yuan.

What Wang Wenhua regrets most is having let go of some precious jade too early and too easily. She is 35 and has been a jade dealer since 1997.

"Most of my collections sold in early years for several hundred yuan, a thousand at most for the really good ones. It was still a decent price at that time, but who would have thought what would happen next?"

She explained that Hetian jade is found in two forms, shanliao (nephrite), which is extracted from a mine cave, and ziliao (pebble), which is burnished by a thousand years in a river.

There is no list price for jade, she said, but 10 years ago a universally acceptable price for fine primary nephrite - the natural stone - would have been about 10,000 yuan a kilogram (more than $1,500 at today's exchange rate). Today, the price would be at least 1 million yuan ($157,000).

In the same 10 years, the global price of gold has only tripled.

"For jade pebbles that are engraved by nature, you can hardly put a price on them now," Wang said. "It's all up to how much the buyers want to pay."

It was reported that a decorative jade cabbage that was produced in Yangzhou and exhibited at the 2010 Shanghai Expo was bought by an anonymous French couple for 130 million yuan ($21 million). Yangzhou Jade Workshop later denied the report, explaining that the item was a national treasure and thus not for sale, but the story is still widespread.