Colour-change sapphire and diamond pendant

Centring on a cushion-shaped colour-change sapphire, within surround set with circular-cut diamonds, mounted in platinum, to a fine curb link chain,

The correct estimate is CHF 20,000-43,000 / US$ 17,000-36,000. Stamped pt 950 for platinum. Chain stamped PLAT. Colour-change sapphire weighing approximately 66.00 carats, overall clean stone to the naked eye, typical crystal inclusions, some surface reaching on the pavilion, noticeable under close inspection. Colour changes from blue to purple. For further information please refer to the SSEF report. Estimated total diamond weight approximately 1.50 - 1.60 carats. Pendant length approximately 34mm, signs of wear to the metal, scratches consistent with wear, 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. Please note that colour, clarity and weight of gemstones are statements of opinion only and not statements of fact by Sotheby's. We do not guarantee, and are not responsible for any certificate from a gemological laboratory that may accompany the property. We do not guarantee that watches are in working order. 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. Prospective buyers should also refer to refer to any Important Notices regarding this sale, which are printed in the Sale Catalogue, in particular to the Notice regarding the treatment and condition of gemstones and to the Notice regarding import of Burmese jadeite and rubies into the US.
NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING A LOT, ALL LOTS ARE OFFERED AND SOLD "AS IS" IN ACCORDANCE WITH THE CONDITIONS OF BUSINESS PRINTED IN THE SALE CATALOGUE."