Introduction to Grandidierite Gemstone Grandidierite is one of the rarest gemstones with blue blue-green hue. It is popular for its remarkable pleochroism and rarity. Prior to recent discoveries, significant sizes of facet-grade quality stones were almost nearly non-existent. Grandidierite was first discovered in 1902 by a famous mineralogist ” Antoine François Alfred Lacroix”. After discovery, …