Extremely Rare Tumbled Grandidierite Stone From Madagascar - 1.7" - 252.30 Carats

This is an extremely rare bluish green Grandidierite tumbled stone. It is very large and is considered by many to be one of the 10 rarest gemstones in the world.
Location: Madagascar
Size: 4.2 x 3.5 x 2.4 Centimeters
Weight: 50.46 Grams