Cultured pearl, sapphire and diamond necklace

Designed as three rows of cultured pearls measuring approximately 9.0mm, to a central plaque of geometric design set with a cabochon sapphire, brilliant-cut and baguette diamonds, length approximately 450mm.  

Stamped 750 for 18 carat gold. Pearls of white body colour with rose and green overtones, high lustre, some pitting and uneven nacre to the pearls. Sapphire measuring approximately 12.3x11.0x7.9mm calculated to weight approximately 11.54 carats, medium blue, transparent, typical inclusions visible to the naked eye, light abrasions consistent with wear. Estimated total diamond weight approximately 4.00-6.00 carats, estimated colour G-I, estimated clarity VVS-VS on average. Secure clasp. Scratches to metal 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."