This is a wonderful Sharply crystallized Grandidierite on matrix. This species is scarce, to be found on matrix and this is for the first time I have handled a matrix. It is the famous locality, from which specimens were recovered around 1900 and identified in 1902. This rare magnesium, aluminum oxide, and borate silicate occurs in lustrous, slightly translucent, sky-blue crystals, up to 4.5 cm across. This entire Cluster is composed of sharp tabular crystals with a beautiful shape. It’s rare to find a good matrix piece and certainly a very good one. It came from an old collection. 

Specifications

Mineral:
Grandidierite on Matrix

Miniature size Mineral
LWD: 4.5 x 4 x 3.5 cm
XI: 4.5 x 3 x 1.5 cm
XI: 4 x 1 x 1 cm

Locality:
Cap Andrahomana, Ranopiso Department, Anosy (Fort Dauphin) Region, Tuloar (Toliara) Province, Madagascar.