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Grandidierite is one of the most expensive and rare gemstones in the world, and it is one the rarest top 10 gemstone types in the world. Grandidierite was first discovered in 1902 in the southern part of Madagascar. The stone comprises of rare minerals and is named after Alfred Grandidier. The more iron these stones contain, the bluer they appear in color. They are also known for displaying strong trichroic pleochroism. This means they have the ability to reflect three colors depending on the angle they’re viewed from, dark green, dark blue-green and a very light yellow that’s often passed off as being colorless. |
