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Alakamisy-Itenina gem deposit (Lacamisinten), Alakamisy Itenina Commune, Vohibato District, Haute Matsiatra, Madagascari
Regional Level Types
Alakamisy-Itenina gem deposit (Lacamisinten)Deposit
Alakamisy Itenina CommuneCommune
Vohibato DistrictDistrict
Haute MatsiatraRegion

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Name(s) in local language(s):Karieran' i Alakamisy-Itenina, Kaominin' Alakamisy Itenina, Distrikan'i Vohibato, Faritra Haute Matsiatra, Faritanin'i Fianarantsoa, Madagasikara
Location is approximate, estimate based on other nearby localities.
Latitude & Longitude (WGS84): 21° South , 47° East (est.)
Margin of Error:~13km
Locality type:Deposit
Köppen climate type:Cfb : Temperate oceanic climate

Famous for polychromatic gem tourmalines found in a rice field that is situated in an ancient riverbed. A horizon covered by a 20 m thick layer of younger material has been the source of rounded tourmaline pieces up to 20 cm in diameter. Many of these were cut into very nice many-coloured slabs.
The locality is also referred to as a "Ricefield in the Fianarantsoa district".

The name Lacamisinten is a mispelling and the name is used by gem dealers. When the locality name “Alakamsiy-Itenina” is spoken out loud in the local dialect of the malagasy language, it could sounds like “Lacamisinten” in the ears of non-malagasy people.

Regions containing this locality

Somali Plate (Somalia Plate)Tectonic Plate
Fianarantsoa Province, MadagascarProvince

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

Detailed Mineral List:

Formula: Ca(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
Reference: Aurisicchio, C., Demartin, F., Ottolini, L. & Pezzotta, F. (1999): Homogeneous liddicoatite from Madagascar. A possible reference material? First EMPA, SIMS, and SREF data. European Journal of Mineralogy 11, 237-242.
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Reference: 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).
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Reference: Knut Edvard Larsen collection

List of minerals arranged by Strunz 10th Edition classification

Group 9 - Silicates
Unclassified Minerals, Rocks, etc.

List of minerals arranged by Dana 8th Edition classification

Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with borate groups
Unclassified Minerals, Mixtures, etc.

List of minerals for each chemical element

H LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
Li LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
B RubelliteA(D3)G6(T6O18)(BO3)3X3Z
B LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
B TourmalineA(D3)G6(T6O18)(BO3)3X3Z
O RubelliteA(D3)G6(T6O18)(BO3)3X3Z
O LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
O TourmalineA(D3)G6(T6O18)(BO3)3X3Z
Al LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
Si LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)
Ca LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)


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Year (asc) Year (desc) Author (A-Z) Author (Z-A)
ExtraLapis 6, "Turmalin": p 73 + 75 [German version]
Aurisicchio, C., Demartin, F., Ottolini, L., Pezzotta, F. (1999): Homogeneous liddicoatite from Madagascar. A possible reference material? First EMPA, SIMS, and SREF data. European Journal of Mineralogy 11, 237-242.
Pezzotta, F. (1999): Madagaskar. Das Paradies der Mineralien und Edelsteine. ExtraLapis nr 17, 61 (german version) (short notice)

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