3.2cts NATURAL BLUEISH BAGUETTE CUT RARE GRANDIDIERITE GEMSTONE

Item Information

Dimensions (mm) 10.5 x 5.5 x 5mm
Weight (carats) 3.2 carats
Colors
No Treatment
Clarity (I)

Grandidierite is an extremely rare mineral and gem that was first discovered in 1902 in southern Madagascar. The mineral was named in honor of French explorer Alfred Grenadier (1836–1912) who studied the natural history of Madagascar

Origin   : Africa

Size      : 10.5 x 5.5 x 5 MM

Clarity   : I

Hardest : 7 - 7.5 Mohs  

Treatment : Natural

First-known transparent grandidierite gemstone was revealed by GIA in their spring 2003 issue of “Gems & Gemology” - a 0.29-carat gemstone from Sri Lanka. Even very small transparent grandidierite gemstones are highly-valued, with opaque stones being more affordably-priced. Eye-clean grandidierite gemstones are extremely rare and can reach up to $20,000 per carat or more.

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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Pricing & Details

Bid Increment $1
Starting Bid $1
Auction ID 741011
Watchers 12 watching
Viewed 339 times
Starts 20th Mar 2018 8:00am PDT
Ends 27th Mar 2018 8:05am PDT

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