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The world's 10 most expensive stones
During the long years of the Earth's 4 to 4.6 billion years, it has not only nurtured countless lives, but also created a thousand wonders of the world. Gold, diamonds, precious stones, coal, oil, each is a gift from the earth. After billions of years of crustal movement, various types of stones have also evolved, some of which are valuable because of their scarcity and superior quality.
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