Centring on a modified cushion-shaped sapphire weighing 12.00 carats, flanked on each side by bullet-shaped diamonds, mounted in platinum. Ring size: 6

Colour and Clarity: According to the AGL, Gübelin and SSEF reports, the sapphire is natural, of Kashmir origin, with no indications of heating. Please refer to the reports and appendixes for details. In our opinion, the sapphire is of medium-strong tone and saturated blue colour, with nice velvety face-up appearance, very good brilliance and lively. It has very minor abrasions on two facet junctions but not visible to the naked eye. There are also a slight windowing at the culet and slight colour zoning at one corner but not noticeable when worn. Under the 10x loupe inspection, the sapphire is loupe-clean. The diamonds together weighing approximately 0.50 carat, I to J colour, VS clarity. Condition: Platinum ring mount, overall in very good condition.
In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby’s is merely a subjective qualified opinion. Illustrations in the catalogue may not be actual size. Prospective purchasers are reminded that, unless the catalogue description specifically states that a stone is natural, we have assumed that some form of treatment may have been used and that such treatment may not be permanent. Our presale estimates reflect this assumption.Certificates of Authenticity: Various manufacturers may not issue certificates of authenticity upon request. Sotheby’s is not under an obligation to furnish the purchaser with a certificate of authenticity from the manufacturer at any time. Unless the requirements for a rescission of the sale under the Terms of Guarantee are satisfied, the failure of a manufacturer to issue a certificate will not constitute grounds to rescind the sale. Gemological Certificates and Reports: References in the catalogue descriptions to certificates or reports issued by gemological laboratories are provided only for the information of bidders, and Sotheby’s does not guarantee and accepts no responsibility for the accuracy, terms or information contained in such certificates or reports. Please also note that laboratories may differ in their assessment of a gemstone (including its origin and presence, type and extent of treatments) and their certificates or reports may contain different results.NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING CONDITION OF A LOT, ALL LOTS ARE OFFERED AND SOLD “AS IS” IN ACCORDANCE WITH THE CONDITIONS OF SALE PRINTED IN THE CATALOGUE.

Accompanied by Gübelin, SSEF  and AGL reports numbered 16025010, 84266 and CS1073170, dated 22 February 2016, 24 February 2016, and 25 January 2016 respectively, stating that the sapphire is natural, of Kashmir origin, with no indications of heating. Gübelin states that the sapphire 'possesses a richly saturated and homogeneous colour, combined with a high degree of transparency, and a finely proportioned cut. Such a combination of characteristics is rare in natural Kashmir sapphires of this size.'
SSEF Appendix Letter states that the sapphire ‘exhibits an important size and weight of 12.00ct combined with an attractive saturated blue colour and a very fine purity…a natural sapphire from Kashmir of this size and quality is rare and exceptional.’  Also accompanied by SSEF Premium Appendix folio.
AGL Appendix Letter states that 'This sapphire has received the highest origin determination issued by AGL: Classic^TM Kashmir...the sapphire also possesses the quintessential velvety texture and high clarity.' Also accompanied by AGL JewelFolio.