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Gemstone Diamond And Colored Stone Mining In The

2017-3-29Blue Sapphire Diamond Blue sapphire, corundum, ruby, zircon and black spinel.After 30 years of alluvial mining, most gem fields are depleted. more information Spined and Sapphire The Ban Houay Xai sapphire mines trace their history back to 1890. Dark blue sapphire has been mined commercially since the 1970s. Wholesale druzy Jewellery.

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