Update on Gemstone Mining in Luc Yen, Vietnam | Gems ...
Gem spinel, hosted in either marble or placers, was discovered in Luc Yen in 1987, together with ruby and sapphire. Local farmers mine gemquality spinel from placers along the streams and from alluvial deposits. The specimens exhibit red, brownish red, pink, purple, seablue, and skyblue colors (figure 6).
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