Cultured pearl and diamond necklace, Marianne Ostier, circa 1950

The front composed of four strands of cultured pearls supported by decorative openwork plaques at the sides set with 163 round and single-cut diamonds and 18 baguette diamonds weighing a total of approximately 6.00 carats, continuing to two strands of cultured pearls at the back,  the whole strung with 123 cultured pearls measuring approximately 8.5 to 6.7 mm., mounted in platinum, length 14½ inches, signed MO for Marianne Ostier.

The pearls are a creamy white shade with overtones of pink and green, with good luster and minor blemishing. The diamonds are approximately H-I color and VS-SI clarity. The necklace opens by flipping up the middle diamond-set bar on the right hand side (as you're wearing it). In good condition overall. Signed with a stylistic MO for Marianne Ostier on an applied square plaque at the corner of the reverse of the left hand diamond-set segment.
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.