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Zazafotsy Quarry (Amboarohy), Zazafotsy Commune, Ihosy District, Ihorombe Region, Fianarantsoa Province, Madagascar

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Location is approximate, estimate based on other nearby localities.
Latitude & Longitude (WGS84): 21° South , 46° East (est.)
Margin of Error:~47km
Age:494 ± 5 Ma
Geologic Time:Furongian
Dating method:Ar – Ar biotite
Reference for age: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 is
Köppen climate type:Cwa : Monsoon-influenced humid subtropical climate
Name(s) in local language(s):Amboarohy (Ambahatraso), Kaominin'i Zazafotsy, Distrikan' Ihosy, Faritra Ihorombe, Faritanin'i Fianarantsoa, Madagasikara

Granulite facies pelites. Deposit famous for polychromatic corundum crystals.
Located about 35 km N of Ihosy following the RN 7 to Ambalavao. Populary called "Zazafotsy quarry" which also is the name of the village along RN 7 and the center of the Zazafotsy Commune, but originally called Amboarohy (Pezzotta 2005).
Exploitation started here in 1989.

Commodity List

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

Mineral List

6 valid minerals.


Mineralization age: Furongian : 494 ± 5 Ma

Important note: This table is based only on rock and mineral ages recorded below and is not necessarily a complete representation of the geochronology, but does give an indication of possible mineralization events relevant to this locality. As more age information is added this table may expand in the future. A break in the table simply indicates a lack of data entered here, not necessarily a break in the geologic sequence. Grey background entries are from different, related, localities.

Geologic TimeRocks, Minerals and Events
ⓘ Biotite494 ± 5 Ma

This page contains all mineral locality references listed on 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 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.


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Pezzotta F. (2005): Rubini e zaffiri. Corindoni policromi di Amboarohy, Ihosy, Madagascar. Rivista Mineralogica Italiana,30 (2): 116-124.
Caucia F., Boiocchi M. (2005): Corindone. I cromofori nei cristalli policromi di Amboarohy, Ihosy, Madagascar. Risultati degli studi microanalitici. Rivista Mineralogica Italiana, 30 (2): 126-129.
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.
Rakotondrazafy, A.F.M., Giuliani, G., Ohnenstetter, D., Fallick, A.E., Rakotosamizanany, S., Andriamamonjy, A., Ralantoarison, T., Razanatseheno, M., Offant, Y., Garnier, V., Maluski, H., Dunaigre, C., Schwarz, D., and Ratrimo, V. (2008): Gem corundum deposits of Madagascar: A review. Ore Geology Reviews 34, 134-154.

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