Fancy Light Yellow and fancy yellow diamond and diamond necklace

The front set with a fancy yellow cut-cornered rectangular modified brilliant-cut diamond weighing 12.12 carats, suspended from three rectangular mixed-cut diamonds weighing respectively 1.01, 1.21 and 1.54 carats, further continuing to a row of baguette and oval diamonds of yellow tint, the larger one of a fancy light yellow colour weighing 1.36 carats, mounted in white and yellow gold, length approximately 400mm, pendant detachable.

Stamped 750 for gold. For further information on the main diamonds, please refer to the GIA reports. Smaller diamonds stated to weigh approximately 22.00 carats. Normal signs of 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."