Sapphire and diamond brooch

Claw set at the centre with a cushion-shaped sapphire within surrounds of old-mine diamonds,

French assay mark for platinum. Estimated total diamond weight approximately 10.00-12.00 carats, on average I-J colour, SI clarity, a few I, graded and gauged in mount. Sapphire a deep blue hue with medium to good saturation of colour, few typical inclusions visible under 10x magnification, clean stone to the unaided eye. Some abrasion to facet junctions and light scratches due to normal wear. For further information on the sapphire please refer to the report. Signs of normal wear to the metal, scratches consistent with age and use. 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."