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No.416 Jianye Road, South Jinqiao Area, Pudong, Shanghai, China
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Both China and Vietnam ... This notion of balancing costs and benefits of gem mining has ... This article is < ...
Much of the gemstone mining in the United States is done by rockhounds (amateurs who search for rocks, minerals, gemstones, and fossils as a hobby).
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Vietnam ruby: Ruby mining at Quy Chau, Nghe An Province, Vietnam. Also the Vietnamese gem industry.
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Feb 15, 2014· Luc Yen – The unique gem market in Vietnam. VietNamNet Bridge ... many of them must use machines to dig deeply on the mountains then wash the soil for gems.
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Rubies were discovered in the Luc Yen area of Vietnam's Yen Bai province in 1987. Soon sapphires, spinels, tourmaline, gem-quality feldspar, pargasite, and humite ...
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