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Ilakaka gem deposit, Ilakaka Commune, Ranohira District, Horombe Region, Fianarantsoa Province, Madagascar
Detailed Mineral List:
| 'Almandine-Pyrope Series' | ||
| Colour: | transparent | |
| Description: | "star garnet" materiale displaying asterism | |
| Reference: | Schmetzer, K., Glas, M. & Bernhardt, H-J. (2002): Sterngranate aus Madagaskar. Lapis 27 (2), 20-27 | |
| Andalusite | ||
| Formula: | Al2(SiO4)O | |
| Reference: | Giuliani, G., Fallick, A., Rakotondrazafy, M., Ohnenstetter, D., Andriamamonjy, A., Ralantoarison, T., Rakotosamizanany, S., Razanatseheno, M., Offant, Y., Garnier, V., Dunaigre, C., Schwarz, D., Mercier, A., Ratrimo, V., and Ralison, B. (2007): Mineralium Deposita 42, 251-270. | |
| Beryl | ||
| Formula: | Be3Al2(Si6O18) | |
| Reference: | http://www.minsocam.org/MSA/Special/Pig/PIG_articles/Madagascar_txt.pdf | |
| Chrysoberyl | ||
| Formula: | BeAl2O4 | |
| Reference: | http://www.minsocam.org/MSA/Special/Pig/PIG_articles/Madagascar_txt.pdf | |
| Chrysoberyl var: Alexandrite | ||
| Formula: | BeAl2O4 | |
| Reference: | Giuliani, G., Fallick, A., Rakotondrazafy, M., Ohnenstetter, D., Andriamamonjy, A., Ralantoarison, T., Rakotosamizanany, S., Razanatseheno, M., Offant, Y., Garnier, V., Dunaigre, C., Schwarz, D., Mercier, A., Ratrimo, V., and Ralison, B. (2007): Mineralium Deposita 42, 251-270. | |
| Corundum var: Sapphire | ||
| Formula: | Al2O3 | |
| Reference: | Schmetzer, K.(1999): Rubine und verschiedenfarbige Saphire aus Ilakaka, Madagaskar. Lapis 24(6), 46-47 | |
| Elbaite | ||
| Formula: | Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH) | |
| Reference: | http://www.minsocam.org/MSA/Special/Pig/PIG_articles/Madagascar_txt.pdf | |
| 'Garnet' | ||
| Formula: | X3Z2(SiO4)3 | |
| Reference: | Giuliani, G., Fallick, A., Rakotondrazafy, M., Ohnenstetter, D., Andriamamonjy, A., Ralantoarison, T., Rakotosamizanany, S., Razanatseheno, M., Offant, Y., Garnier, V., Dunaigre, C., Schwarz, D., Mercier, A., Ratrimo, V., and Ralison, B. (2007): Mineralium Deposita 42, 251-270. | |
| Kyanite | ||
| Formula: | Al2(SiO4)O | |
| Reference: | http://www.minsocam.org/MSA/Special/Pig/PIG_articles/Madagascar_txt.pdf | |
| Quartz var: Amethyst | ||
| Formula: | SiO2 | |
| Reference: | http://www.minsocam.org/MSA/Special/Pig/PIG_articles/Madagascar_txt.pdf | |
| Spinel | ||
| Formula: | MgAl2O4 | |
| Reference: | Giuliani, G., Fallick, A., Rakotondrazafy, M., Ohnenstetter, D., Andriamamonjy, A., Ralantoarison, T., Rakotosamizanany, S., Razanatseheno, M., Offant, Y., Garnier, V., Dunaigre, C., Schwarz, D., Mercier, A., Ratrimo, V., and Ralison, B. (2007): Mineralium Deposita 42, 251-270. | |
| Topaz | ||
| Formula: | Al2(SiO4)(F,OH)2 | |
| Reference: | Giuliani, G., Fallick, A., Rakotondrazafy, M., Ohnenstetter, D., Andriamamonjy, A., Ralantoarison, T., Rakotosamizanany, S., Razanatseheno, M., Offant, Y., Garnier, V., Dunaigre, C., Schwarz, D., Mercier, A., Ratrimo, V., and Ralison, B. (2007): Mineralium Deposita 42, 251-270. | |
| Zircon | ||
| Formula: | ZrSiO4 | |
| Reference: | Giuliani, G., Fallick, A., Rakotondrazafy, M., Ohnenstetter, D., Andriamamonjy, A., Ralantoarison, T., Rakotosamizanany, S., Razanatseheno, M., Offant, Y., Garnier, V., Dunaigre, C., Schwarz, D., Mercier, A., Ratrimo, V., and Ralison, B. (2007): Mineralium Deposita 42, 251-270. | |
13 entries listed. 8 valid minerals.
References
- Schmetzer, K.(1999): Rubine und verschiedenfarbige Saphire aus Ilakaka, Madagaskar. Lapis 24(6), 46-47.
- Schmetzer, K., Glas, M. & Bernhardt, H-J. (2002): Sterngranate aus Madagaskar. Lapis 27 (2), 20-27
- Hogg, Jonny (2007): Madagascar's sapphire rush. BBC News, 17 November 2007.
- Giuliani, G., Fallick, A., Rakotondrazafy, M., Ohnenstetter, D., Andriamamonjy, A., Ralantoarison, T., Rakotosamizanany, S., Razanatseheno, M., Offant, Y., Garnier, V., Dunaigre, C., Schwarz, D., Mercier, A., Ratrimo, V., and Ralison, B. (2007): Oxygen isotope systematics of gem corundum deposits in Madagascar: relevance for their geological origin. Mineralium Deposita 42, 251-270.
- http://www.gggem.com/moreaboutilakaka.htm
- Schmetzer, K., Glas, M. & Bernhardt, H-J. (2002): Sterngranate aus Madagaskar. Lapis 27 (2), 20-27
- Hogg, Jonny (2007): Madagascar's sapphire rush. BBC News, 17 November 2007.
- Giuliani, G., Fallick, A., Rakotondrazafy, M., Ohnenstetter, D., Andriamamonjy, A., Ralantoarison, T., Rakotosamizanany, S., Razanatseheno, M., Offant, Y., Garnier, V., Dunaigre, C., Schwarz, D., Mercier, A., Ratrimo, V., and Ralison, B. (2007): Oxygen isotope systematics of gem corundum deposits in Madagascar: relevance for their geological origin. Mineralium Deposita 42, 251-270.
- http://www.gggem.com/moreaboutilakaka.htm
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