Diamond and pink sapphire ring, Bulgari

The circular-cut diamond of yellow tint, collet-set within a hexagonal mount decorated with circular-cut pink sapphires, size 51^1/2, signed Bulgari, Italian assay mark. 

Signed Bulgari on inside of shank. Stamped 750 for 18 carat yellow gold. Pink sapphires well matched in colour, few scratches and nicks. Diamond estimated to measure approximately 13.75 x 13.45 x 8.55 mm, estimated to weigh approximately 9.90 carat, in our experts' opinion of yellowish tint, I clarity, as gauged and graded in yellow gold mounting. Signs of normal wear to the metal, scratches consistent with use. In good condition. Gross weight approximately 20 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 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."