Set in the center with a light gray cultured pearl of approximately 15.0 mm, framed by rays of round pink tourmalines weighing approximately 12.50 carats and round diamonds weighing approximately 3.75 carats, mounted in platinum, signed Tiffany & Co. and Fireworks, c. 1995. 

Excellent condition. The light grey pearl bears soft pink and green overtones, very good luster and very minor surface irregularities. The tourmalines are medium-light purplish pink and eye-clean. The diamonds are approximately G-H color, VVS-VS clarity.
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.

For similar "fireworks" brooches, see John Loring, Tiffany's 20th Century, p. 19.  According to the author, these jeweled, colorful brooches were inspired by Tiffany's designs for the 1939 World's Fair.