Diamond and pearl bow brooch, circa 1910

The ribbon bow of lattice motif set throughout with 70 old European-cut, old-mine and single-cut diamonds weighing approximately 6.40 carats, the center accented with a natural pearl measuring approximately 9.8 by 9.4 mm., further decorated with 15 smaller pearls, mounted in platinum. 

See GIA report stating the center pearl is natural. The pearl is a creamy rose color, with overtones of blue-green, it is slightly off-round, with good luster and minor blemishing. The additional smaller pearls are of similar color and quality, but have not been tested for natural origin. Diamonds are approximately H-J color and SI-I clarity. In good condition. There is a pendant loop in the center below the pearl.
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.

Accompanied by GIA report no. 17428000 stating that the pearl is natural.