Gem Set and Diamond Brooch, Michele della Valle

Designed as a bouquet of poppy and cornflowers, the petals embellished with circular-cut rubies or sapphires weighing approximately 20.00 and 8.00 carats in total respectively, to the calibré-cut tourmaline petiole, highlighted with a circular-cut diamond-set ribbon, mounted in 18 karat white and plated gold, signed Michele della Valle and numbered, case stamped Michele della Valle.

Signed Michele della Valle, numbered 150744 with Italian assay mark for 18K gold. Stamped 750 for 18 karat white and plated gold. Rubies of pinkish red colour are well matched and of strong saturation, estimated to weigh approximately 20.00 carats in total, with minor typical inclusions, some surface reaching under 10X magnification, but generally not visible. Sapphires, estimated to weigh approximately 8.00 carats in total, are medium blue of medium strong to strong saturation and with typical inclusions under 10X magnification. Tourmaline, estimated to weigh approximately 1.80 carats in total, are medium yellowish green colour of good saturation and generally eye clean. Diamonds, estimate to weigh approximately 1.50 carats in total, are on average J to K colour and mostly SI clarity, as gauged and graded in the mounting. Enamel in very good condition. Signs of normal wear to the metal consistent with use. Overall in very good condition. Case signed Michele della Valle.
In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. 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. Illustrations in the catalogue may not be actual size. Prospective purchasers are reminded that, unless the catalogue description specifically states that a stone is natural, we have assumed that some form of treatment may have been used and that such treatment may not be permanent. Our presale estimates reflect this assumption.Certificates of Authenticity: Various manufacturers may not issue certificates of authenticity upon request. Sotheby's is not under an obligation to furnish the purchaser with a certificate of authenticity from the manufacturer at any time. Unless the requirements for a rescission of the sale under the Terms of Guarantee are satisfied, the failure of a manufacturer to issue a certificate will not constitute grounds to rescind the sale. Gemological Certificates and Reports: References in the catalogue descriptions to certificates or reports issued by gemological laboratories are provided only for the information of bidders, and Sotheby's does not guarantee and accepts no responsibility for the accuracy, terms or information contained in such certificates or reports. Please also note that laboratories may differ in their assessment of a gemstone (including its origin and presence, type and extent of treatments) and their certificates or reports may contain different results.NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING CONDITION OF A LOT, ALL LOTS ARE OFFERED AND SOLD "AS IS" IN ACCORDANCE WITH THE CONDITIONS OF SALE PRINTED IN THE CATALOGUE.