18MA29 Grandidierite
Tranomaro Commune, Amboasary District, Anosy Region, Tuléar Province, Madagascar
4.0x 2.0x 1.4 cm
$600

In 2016 there was a rather spectacular find of this very rare blue-green borosilicate mineral in southern Madagascar.  I has seen some available on my previous trip, but the quality was horrible-- they were basically formless shards, and few if any had crystal faces.

There was a little bit more available this time around, but once again, the majority were shards.  Still, I looked through them and was able to obtain a small number of pieces that had visible crystal faces-- this one is quite exceptional, as it is composed of a few diverging crystals with very clear and sharp faces (though it's contacted on the reverse.)

It really is quite good for what it is.









Similar Minerals

18MA04 Grandidierite
Tranomaro Commune, Amboasary District, Anosy Region, Tuléar Province, Madagascar
3.8x 3.2x 1.4 cm
$1350
18MA30 Grandidierite
Tranomaro Commune, Amboasary District, Anosy Region, Tuléar Province, Madagascar
2.1x 2.0x 1.8 cm
$1000
18MA31 Grandidierite
Tranomaro Commune, Amboasary District, Anosy Region, Tuléar Province, Madagascar
2.9x 0.85x 0.35 cm
$430
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