Ruby deposit in calcite marble formed by regional metamorphism. About 50% of the production is of inferior colour - light red, light pink or colourless corundum.
References
- Yunkui Qian (2004): The coloration mechanism and color-correction effect of Yuanjiang ruby, Yunnan. Yunnan Geology 23(3), 337-342.
- Dong Ye and Xueliang Liu (2006): Study on Gemmological Characteristics of Rubies from Yuanjiang, Yunnan Province. Journal of Gems and Gemmmology 8(3), 21-24.
Mineral List
15 entries listed. 12 valid minerals.
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