Emerald and diamond necklace, Mid 19th Century

The necklace designed as a series of graduated clusters, each set with a step-cut emerald within a border of cushion-shaped and circular-cut diamonds, length approximately 460mm, larger clusters with pendant loops to reverse, two deficient, French import marks; together with a later brooch of similar design, mounted in closed back setting, later brooch fitting, partial maker's mark, part illustrated.

Necklace: stamped with French import marks for silver and gold. Emeralds light to medium green, typical inclusions visible to naked eye and under magnification, abrasions to facet edges. Emeralds graduated from the tongue measuring approximately: 4.8 x 5 x 3.1 = 0.52 6.5 x 4.8 x 3.2 = 0.69 6.4 x 4.9 x 3 = 0.65 5.4 x 5.6 x 3.4 = 0.71 6.2 x 6.4 x 3.2 = 0.88 7.9 x 6.6 x 3.1 = 1.12 6.4 x 6.6 x 4.4 = 1.29 7.8 x 7.3 x 4.6 = 1.81 8.8 x 7.2 x 4.5 = 1.97 7.5 x 6.4 x 4.5 = 1.50 6.5 x 5.8 x 4 = 1.04 7.2 x 6.4 x 3.7 = 1.18 7 x 6 x 2.8 = 0.81 5.5 x 5.2 x 3.5 = 0.69 7 x 5.5 x 2.8 = 0.75 4.7 x 5.1 x 3.5 = 0.58 Total emerald weight approximately 16.19 carats Estimated total diamond weight approximately 22.00-24.00 carats, mixed colours and clarities, estimated I-K a few stones tinted, Si a few stones included. One cluster with fittings to reverse for brooch/ tiara fitting, brooch/ tiara fittings now deficient. Central seven clusters with pendant loops to reverse, two loops deficient. Clasp fitting secure. Well articulated. Abrasions and tarnish to mount consistent with wear. Brooch: Emerald measuring approximately 14.6 x 12.0 x 6.2mm, calculated to weigh approximately 7.98 carats, medium green, typical inclusions visible to naked eye and under magnification, surface reaching fractures. Diamond bright and lively. Abrasions and tarnish to mount consistent with wear. Clasp fitting secure. Both in good condition. Accompanied by case signed Boni-Manara & Co, Angelo Missiaglia, Venezia, the cover stamped with the initials C.C. F. and a coronet.
"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."