Diamond and black and white cultured pearl brooch, Van Cleef & Arpels

Of stylized floral design, set in the center with a white cultured pearl of approximately 15.5 mm., surrounded by 36 round, marquise-shaped and pear-shaped diamonds, supporting a cultured pearl pendant drop of natural black color measuring approximately 20.0 by 15.3  mm., capped by marquise-shaped diamonds and a single round diamond, the total diamond weight approximately 18.50 carats, mounted in platinum, signed VCA and maker's mark, pendant detachable. 

The pin clasp is signed VCA PT950. There is a maker's mark for VCA on the pin stem itself. Diamonds are approximately F-G color and VS-SI clarity. The white slightly button shaped pearl is a creamy white shade with overtones of pink and blue, good luster and minor blemishing. The black pearl is a deep gray color with overtones of green and purple, good luster, slightly ringed at the top and with minor blemishing. 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. 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.
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.