Sapphire and diamond brooch, late 19th century

Of fleur-de-lys design, set with cushion-shaped sapphires and similarly-cut diamonds, later monogrammed to reverse.   

Monogram depicting letters 'M' and 'S', dated 14-4-87. Mounted in gold and silver. Estimated total diamond weight approximately 5.50-6.50 carats, mixed colours and clarities, some stones I Clarity. Central sapphire measuring approximately 9.4 x 8.0 x 6.2 mm, calculated to weigh approximately 3.73 carats, medium blue with good saturation, typical inclusions visible under magnification. Remaining sapphires medium to dark blue, good saturation, typical inclusions visible to the naked eye, slight abrasions to facet edges. Secure clasp fitting. Scratches to metal consistent with 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."