Exceptional emeralds @ Christie's. Jewels: The Geneva Sale

An exceptional octagonal-shaped emerald  ring. Photo: Christie's Images Ltd., 2010

Set with an octagonal-shaped emerald weighing 25.83 carats, to the shield-shaped diamond shoulders, mounted in platinum, size 6. Estimate CHF650,000 - CHF850,000 - Price Realized CHF1,035,000

Accompanied by report no. 57222 dated 3 September 2010 from the SSEF Swiss Gemmological Institute stating that the emerald is of Colombian origin, with indications of minor clarity modification (oil)

Report no. 2125331226 dated 12 July 2010 from the GIA Gemological Institute of America stating that the emerald is of Colombian origin, with no indications of clarity enhancement

Report no. CS 41874 dated 16 March 2010 from the AGL American Gemological Laboratories stating that the emerald is of Colombian origin, with no clarity enhancement, and a letter stating that the emerald has received a very high overall colour grade of 2.5, on a scale going from 1 to 10, 1 being the top category

The Muzo Emerald. Photo: Christie's Images Ltd., 2010

The unmounted rectangular-cut emerald weighing 9.27 carats. Estimate CHF380,000 - CHF580,000 - Price Realized CHF819,000

Accompanied by report no.1006152 dated 17 June 2010 from the Gübelin GemLab stating that the emerald is of Colombian origin, with no indications of clarity enhancement, with Note and Appendix

Report no. 10-G-3515 dated 5 August 2010 from the GemTechLab stating that the emerald is of Colombian origin, from the Muzo mine, with no indication of clarity enhancement

Report no. 57534 dated 30 September 2010 from the SSEF Swiss Gemmological Institute stating that the emerald is of Colombian origin, with no indications of clarity enhancement, and an Appendix stating "Natural emeralds from Colombia of this size, colour and purity represent a great rarity and the described gemstone is thus a very exceptional treasure"

A group of three unmonted emeralds. Photo: Christie's Images Ltd., 2010

Composed of two emerald drop beads and one emerald plaque, weighing a total of 164.35 carats (3).  Estimate CHF25,000 - CHF35,000 - Price Realized CHF267,000

Provenance: Property of an important Asian Royal family

Christie's. Jewels: The Geneva Sale, 17 November 2010. Geneva www.christies.com