Grandidierite is a rare gemstone Discovered by French Naturalist explorer Alferd grandidier in southern Madagascar in 1902, the gemstone was named in honor of him, he studied the natural history and geography of Madagascar, Visited the island several times.
The early acquisition of the crystals were not much of Facet grade material but still was a gem Collector’s choice to add any Sample of the rare gem in their collection
However after a century of limited production and unlimited expedition a new deposit outside the town of tranomaro near the Original Old locality of Andrahomana was found and High facet grade material started hitting up the Gem market in Bangkok, it came in notice of dealers when GIA issued them Certificates Describing the Gem crystal samples as Grandidierites, several companies and Dealers including GIA rushed towards the mines in madagascar to witness and acquire as much as facet grade material from the new deposit as they can Because of the Rarity of the gemstone especially in higher quality,
0.11ct round brilliant grandidierite from a new deposit near the town of Tranomaro in southern Madagascar. Photo by Delphine Bruyere
Grandidierite is considered one of the rarest Gemstones in world with a mohs scale hardness of 7.5 Formula:MgAl3O2(BO3)SiO4 chemical formula close to Kornerupine
Colour ranges from: Dark green, Bluish green, colourless
Fine cut Gems can fetch up a price ranging from 10,000-100,000$ per carat
Crystals up to 8 cm in length and limited amounts of facet grade rough are found in southern Madagascar.