COLOUR-CHANGING STAR SAPPHIRE AND DIAMOND BROOCH / PENDANT

Of girandole design, centring on an oval colour-changing star sapphire weighing 79.54 carats, within a stylised frame pavé-set with circular-cut diamonds, surmounted by a retractable pendant loop set with an inverted pear-shaped diamond, anchoring three oscillating pear-shaped diamonds, the diamonds together weighing approximately 2.50 carats, mounted in platinum, removable brooch fitting.

Colour and Clarity: According to GRS report, the star sapphire is natural, of Ceylon origin, with no indications of thermal enhancement, showing a colour-changing feature of blue in daylight, to purple in incandescent light. Please refer to the report for details. In our opinion, the cabochon sapphire is of medium light saturation, displaying a moderate star effect and colour-changing phenomenon. There is a natural fingerprint inclusion to the bottom, not noticeable when worn. Diamonds are about H to I colours, VS to SI1 clarity. Condition: Pendant loop is retractable, with removable brooch fitting, overall in 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.
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 GRS report numbered GRS2010-012237, dated 21 January 2010, stating that the 79.54 carat colour-changing star sapphire is natural, of Sri Lankan origin, colour-changing from blue (daylight) to purple (incandescent light), with no indication of thermal reatment.