Extremely Rare Grandidierite Sphere Ball From Madagascar - 18.3 Carats - 0.5"

Description: This is one of the rarest minerals in the world, a fine greenish blue Grandidierite sphere from Madagascar. Fine specimen, and is considered one of the 10 rarest gemstones based on numerous articles.
Location: Mandrare, Betroka, Madagascar
Size: 1.3 Centimeter diameter
Weight: 3.67 Grams