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Huge Grandidierite Gemstones at GemSelect - Top 10 Rarest Gemstones!


Grandidierite is a very rare collector's gemstone often referred to as one of the top 10 rarest gemstones in the world! It was named in honor of the French naturalist and an explorer of Madagascar, Alfred Grandidier. Grandidierite was first discovered in Madagascar in 1902 and then later in small quantities in other parts  of the world. Grandidierite gemstones are highly sought after after by collectors. It is rarely found in gem-quality, and faceted gemstones command extremely high prices. In fact, even abochons can fetch hundreds of dollars per carat, and for those with excellent color and clarity, it is not unheard of for cabochons to command thousands per carat.

Grandidierite gems are typically greenish-blue, blue-green or blue, with the most highly saturated neon color being the most valuable. Being a trichroic gem, grandidierite can display yellow, colorless, greenish-blue and blue under polarized light, depending on the viewing angle. The blue color is due to traces of iron, so specimens with more iron content have a higher saturation of blue.

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Happy Gem Hunting!
Derek Lee

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