Collection of four diamond jewels, late 18th century composite

Comprising: three floral motifs and a chain of eighteen circular clusters, all set with cushion-shaped and circular-cut diamonds, central chain cluster adapted from a mourning ring, inscribed to the reverse "Robt Denison Esq, died 20th March, 1785, Aged 62", partial later brooch fittings, tiara frame, three detachable brooch fittings, tiara inner circumference approximately 290mm.

Mounted in silver. Central cluster inscribed "Robt Denison Esq", "Died 20 March 1785" and "Aged 62", adapted from a late 18th century mourning ring with partial late 19th century brooch fittings to the reverse, pin deficient. Each floral jewel with a late 19th century detachable brooch pin, all three jewels with original loop attachments to the reverse. Riviere length approximately 290mm, detachable into five sections with late 19th century gold loop fittings to the reverse. Silver mounting with minor abrasions and scratches consistent with age and wear. Two clusters with some discolouration to foil on reverse. Diamonds estimated to weigh a total of approximately 90.00 - 110.00 carats, of mixed colours, on average SI clarity, a few smaller stones I clarity, as gauged and graded in the mounting. Please note that due to the nature of the setting, it is not possible to provide an accurate estimation as to the weight and colours of the diamonds. Evidence of lead solder on reverse. In very good condition. Total gross weight approximately 161 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."