A 28.04 ct Padparadscha sapphire at Christie’s sale in Magnificent Jewels & The Pink Promise on 28 November 2017.
A 28.04 ct Padparadscha sapphire white gold ring (Lot No. 2064) was sold for $ 2 470 000, or about $ 88,000 per carat.
A 4.01 ct ruby at Christie’s sale in Hong Kong Magnificent Jewels & The Pink Promise on 28 November 2017.
An approximately 4.01 ct Ruby yellow gold ring (Lot No. 2042) was sold for $ 1 087 000, or about $ 271 000 per carat.
A 9.25 ct colombian emerald at Sotheby’s New York sale of December 5, 2017
A 9.25 carats “insignificant to minor” Colombian emerald Tiffany&Co white gold ring Tiffany and Co. white gold ring (Lot n° 160) was sold at $ 1 695 000, about around $ 183 000 per carat.
A 8.01 ct colombian emerald at Sotheby’s New York sale of decembre 5, 2017 : Lot n° 183
Colombian emerald of 8.01 ct, was sold at $ 1,035,000 about $ 129 200 per carat.
