Extremely Rare Grandidierite Silver Ring From Madagascar - Size 8.5

Description: This is one of the rarest minerals in the world, a fine greenish blue Grandidierite silver ring from Madagascar. It has very good transluscency. Fine specimen, and is considered one of the 10 rarest gemstones based on numerous articles. The stone is 1.6 cm.
Location: Mandrare, Betroka, Madagascar
Size: 8.5
Weight: 4.1 Grams