Centring on a colour-changing star sapphire weighing 17.12 carats, within an oval diamond surround embellished with circular-cut diamond spacers, to the circular-cut diamond border and shoulders, the diamonds together weighing approximately 4.00 carats, mounted in 18 karat white gold. Ring size:7

Colour and Clarity: According to the Gübelin report, the colour-changing star sapphire is natural, of Sri Lankan origin, with no indications of heating, and displays a distinct asterism (star effect). Please refer to the report for details. In our opinion, the sapphire of medium tone, colour change from violet in daylight to purple in incandescent light. Under the 10x loupe inspection, there are minor typical crystal, fingerprint and silk inclusions, a few tiny pits and chips at the dome but not noticeable to the naked eye, and a minor opening at the base. The diamonds are about F to G colour, the oval-shaped diamonds are SI clarity, and the circular-cut melee diamonds are VVS to VS clarity. Condition: Karat white gold mount, with minor hairline scratches on the shank. otherwise in very good overall 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.
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 report numbered 15121039, dated 23 December 2015, stating that the 17.12 carat colour-changing star sapphire is natural, of Sri Lankan (Ceylon) origin, with no indications of heating, and displays a distinct asterism, colour-changing from violet in daylight to purple in incandescent light.