18MA30 Grandidierite
Tranomaro Commune, Amboasary District, Anosy Region, Tuléar Province, Madagascar
2.1x 2.0x 1.8 cm
$1000

Simply put, this is an exceptional crystal of grnadidierite, and a killer thumbnail of the species.  It is **actually terminated** and not just a thin crystal but rather has some blockiness.  The faces of the top are a bit etched, though when a bit of light reflects off the top, you can clearly see the completeness of the crystal.  Even the translucency of this crystal is better than most-- this is the material that gets used for cabbing, those are almost exclusively broken shards of gem rough.  This is not cheap, nor is it perfect (there is a chip on the top edge) but you would have a very hard time finding a larger, more complete or translucent example of the species... this thing was expensive even in Madagascar.

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 much less a termination.

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, and even a few with terminations.  This one has both.

It really is *very* 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
18MA29 Grandidierite
Tranomaro Commune, Amboasary District, Anosy Region, Tuléar Province, Madagascar
4.0x 2.0x 1.4 cm
$600
18MA31 Grandidierite
Tranomaro Commune, Amboasary District, Anosy Region, Tuléar Province, Madagascar
2.9x 0.85x 0.35 cm
$430
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