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4 mai 2014

Unmounted fancy dark grey-yellowish green diamond

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Unmounted fancy dark grey-yellowish green diamond. Photo Sotheby's.

The step-cut fancy dark grey-yellowish green diamond weighing 63.83 carats, fitted case. Estimation 405,000 — 625,000 CHF

Accompanied by GIA report no. 5151695705, stating that the diamond is Fancy Dark Gray-Yellowish Green, Natural Colour, together with an appendix letter expressing the rarity of this diamond.

"This color is described in the GIA Fancy Colored Grading system as Fancy Dark Gray-Yellowish Green. An outstanding feature of this diamond is the inclusion which is eye-visible and nicely framed through the table facet. This pattern is also observable from the pavilion. The inclusion has a six-fold symmetry and is related to the presence of hydrogen-related submicron cloud inclusions in the diamond. The oriented cloud has a flower pattern. Gem diamond with such a distinct symmetry of a cloud is very rare, and its positioning within the polished diamond through the table gives it an overall dramatic appearance," letter from the GIA, 3 October 2013.

Sotheby's. Magnificent Jewels and Noble Jewels, Genève, 13 mai 2014 - http://www.sothebys.com/

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