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Lac Alaotra (Lake Alaotra), Alaotra-Mangoro Region, Toamasina Province (Tamatave), Madagascar

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Location is approximate, estimate based on other nearby localities.
Latitude & Longitude: 17° South , 48° East (est.)
Margin of Error:~214km
Name(s) in local language(s):Lac Alaotra, Faritra Alaotra-Mangoro, Faritanin'i Toamasina, Madagasikara

Lac Alaotra is situated about 180 km NE of the capitol Antananarivo, and is the biggest lake in Madagascar. Several mineral localities are found around the lake. In general the localities west and northwest of the lake belongs to the Amparafaravola District and the localities east and south of the lake belongs to the Ambatondrazaka District . Several LCT pegmatites of the Beryl-Columbite subtype are located east of the lake, and LCT pegmatites of the Chrysoberyl subtype southeast of the lake.

Minerals from these localities has often been brought to the market in the town Ambatondrazaka. Thus minerals from this region are often labelled "Ambatondrazaka" or "Lake Alaotra". For chrysoberyl specimens see especially the localities Andreba, Ambatosoratra, Masiadrivotra and Ampanorana Est .

Mineral List

Mineral list contains entries from the region specified including sub-localities

8 valid minerals.

Localities in this Region


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.(1999): Madagaskar- Das Paradies des Mineralien und Edelsteine. ExtraLApis no.17,47-48 [german version]

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