Impressive Yellow sapphire and diamond necklace

The collar of scroll foliate design set with brilliant-cut diamonds, decorated to the front with cushion-shaped yellow sapphires, mounted in yellow gold, length approximately 390mm, two small diamonds deficient.

Stamped 750 for gold. Sapphires estimated to weigh from right to left approximately 30.00, 37.00, 65.00, 43.00 and 24.00 carats. A yellow colour of medium to medium strong saturation. Very clean stones, some very minor crystal inclusions are noticeable to the naked eye, not when worn. For further information, please refer to the SSEF report. Diamonds are estimated to weigh a total of approximately 60.00 - 65.00 carats, G-I colour, VS-SI clarity. One small diamond deficient. Secure clasp with safety catch. Hardly any signs of wear, 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.
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.