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Ilakaka gem deposit, Ilakaka Commune, Ihosy District, Ihorombe Region, Fianarantsoa Province, Madagascar

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Latitude & Longitude (WGS84): 22° 42' 12'' South , 45° 13' 12'' East
Latitude & Longitude (decimal): -22.70336,45.22001
GeoHash:G#: m5bnv4bpq
Locality type:Deposit
Köppen climate type:Cfa : Humid subtropical climate
Name(s) in local language(s):Fitrandrahana safiran' Ilakaka, Kaominin' Ilakaka, Distrikan' Ihosy, Faritra Ihorombe, Faritanin'i Fianarantsoa, Madagasikara


An alluvial gem gravel deposit discovered 1998. One of the largest sapphire deposits in the world. It is located Close to the route national 7 going to Tulear, in the Horombe region in the southwestern part of Madagascar.
A large number of new gem deposits of the same character has also been discovered in the area around Ilakaka and further southwest in the Sakaraha area. There is also a third district near Bezaha close to the Onillahy River 118 km southwest of Ilakaka.

NOTE: the name "Ilakaka" in the litterature refers not only to the Ilakaka deposit, but also sometimes to the whole gem deposit area.



Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


10 valid minerals.

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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.

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