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Ialamitana Pegmatites, Sahanivotry Manandona, Antsirabe II, Vakinankaratra, Madagascari
Regional Level Types
Ialamitana PegmatitesPegmatite Field
Sahanivotry ManandonaCommune
Antsirabe IIDistrict

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Name in Malagasy:Ialamitana, Kaominin'i Sahanivotry Manandona, Distrikan' Antsirabe II, Vakinankaratra, Madagasikara
Location is approximate, estimate based on other nearby localities.
Latitude & Longitude (WGS84): 20° South , 47° East (est.)
Margin of Error:~12km
Locality type:Pegmatite Field
Köppen climate type:Cfb : Temperate oceanic climate
Other/historical names associated with this locality:Ialamaitana

The locality Ialamitana consist of several pegmaties which only a few have benn exploited. One of the workings has produced green, opaque beryls and Antsotsara pegmatite closeby, has produced good up to 3 cm large well-shaped trapezohedrons of red garnets (almandine-spessartine series) and good crystals of "strüverite". It is located in a mountainous area 2km east of Isahanivotry (south of Antsirabe), near Manandona Valley and close to the Vorondolo Massif.

The locality is most probably the one refered to as "a new almandine garnet locality" situated "6 km southeast of the Manandona and 30 km south of Antsirabe" by Moore (1997,1998). Many good pieces was found here in 1996.

The name Ialamaitana is a misnomer (spelling mistake).

Regions containing this locality

Somali Plate (Somalia Plate)Plate
Antananarivo Province, MadagascarProvince (Abolished)

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Standard Detailed Strunz Dana Chemical Elements

Mineral List

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

6 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

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

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Alphabetical List Tree Diagram

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
var: Rose Quartz4.DA.05SiO2
var: Strüverite4.DB.05(Ti,Ta,Fe)O2
Group 9 - Silicates
Unclassified Minerals, Rocks, etc.
'Almandine-Spessartine Series'-
'K Feldspar'-

List of minerals arranged by Dana 8th Edition classification

var: Strüverite4.4.1.3(Ti,Ta,Fe)O2
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Six-Membered Rings with borate groups
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Unclassified Minerals, Mixtures, etc.
'Almandine-Spessartine Series'-
'K Feldspar'-
var: Rose Quartz

List of minerals for each chemical element

H SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Be BerylBe3Al2(Si6O18)
B TourmalineA(D3)G6(T6O18)(BO3)3X3Z
B SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
O BerylBe3Al2(Si6O18)
O QuartzSiO2
O Rutile (var: Strüverite)(Ti,Ta,Fe)O2
O TourmalineA(D3)G6(T6O18)(BO3)3X3Z
O HematiteFe2O3
O RutileTiO2
O Quartz (var: Rose Quartz)SiO2
O SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
O AlmandineFe32+Al2(SiO4)3
Na SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Al BerylBe3Al2(Si6O18)
Al SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Al AlmandineFe32+Al2(SiO4)3
Si BerylBe3Al2(Si6O18)
Si QuartzSiO2
Si Quartz (var: Rose Quartz)SiO2
Si SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Si AlmandineFe32+Al2(SiO4)3
Ti Rutile (var: Strüverite)(Ti,Ta,Fe)O2
Ti RutileTiO2
Fe Rutile (var: Strüverite)(Ti,Ta,Fe)O2
Fe HematiteFe2O3
Fe SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Fe AlmandineFe32+Al2(SiO4)3
Ta Rutile (var: Strüverite)(Ti,Ta,Fe)O2


Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Moore, T. (1997) What's New in Minerals. Mineralogical Record. 28: 60-61
Moore, T. (1998) What's New in Minerals. Mineralogical Record. 29:132
Moore, T. (2008) What's New in Minerals. Dallas Show 2008. Mineralogical Record. 39: 332
Praszkier, T. (2010) Ialamaitana Pegmatites. Mineralogical Record. 41: 266

Localities in this Region
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  • Vakinankaratra
    • Antsirabe II
      • Sahanivotry Manandona

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