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Sri Lanka | |
| [var. Ruby] Gübelin, E. and Wolgensinger, M. (1976) Edelstenen. Uitgeverij Artis, Brussel (in Dutch). |
| [var. Sapphire] Shigley, J. E., Laurs, B. M., Janse, A. J. A., Elen, S., & Dirlam, D. M. (2010). Gem Localities of the 2000s. Gems & Gemology, 46(3). |
| [var. Sapphire] |
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| [var. Sapphire] Shigley, J. E., Dirlam, D. M., Laurs, B. M., Boehm, E. W., Bosshart, G., & Larson, W. F. (2000). Gem localities of the 1990s. Gems & Gemology, 36(4), 292-335. |
| Dissanayake, C. B., Chandrajith, R. O. H. A. N. A., & Tobschall, H. J. (2000). The geology, mineralogy and rare element geochemistry of the gem deposits of Sri Lanka. BULLETIN-GEOLOGICAL SOCIETY OF FINLAND, 72(1/2), 5-20. |
| Dissanayake, C. B., Chandrajith, R. O. H. A. N. A., & Tobschall, H. J. (2000). The geology, mineralogy and rare element geochemistry of the gem deposits of Sri Lanka. BULLETIN-GEOLOGICAL SOCIETY OF FINLAND, 72(1/2), 5-20. |
| [var. Sapphire] Shigley, J. E., Dirlam, D. M., Laurs, B. M., Boehm, E. W., Bosshart, G., & Larson, W. F. (2000). Gem localities of the 1990s. Gems & Gemology, 36(4), 292-335. Rob Lavinsky |
| [var. Sapphire] Econ Geol (1981) 76:733-738 Joseph A. Freilich. |
Gem gravels, Ratnapura, Ratnapura District, Sabaragamuwa Province, Sri Lanka