Diamond necklace, late 19th century composite

Designed as a line of slightly graduated circular-cut diamonds, supporting three detachable plaques of scroll and foliate design set with circular-cut, cushion-shaped and rose diamonds, length approximately 365mm, one small diamond deficient.

In our expert's opinion, the central circular-cut diamond measuring approximately 9.08 x 9.14 x 4.63mm and calculated to weigh approximately 2.30 - 2.50 carats, is I-J colour, SI clarity, as gauged and graded in the mounting. Remaining diamonds estimated to weigh a total of approximately 38.00 - 42.00 carats, on average I-K colour, some M+, SI-I clarity, as gauged and graded in the mount, one small diamond deficient. Scratches and signs of wear to the metal consistent with age and use. In good condition. Total gross weight approximately 133 grams.
"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.
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."