Cabochon emerald and diamond pendant-necklace

The pendant set with a large oval cabochon emerald within a hinged door-knocker style frame pavé-set with round diamonds and set at the top with a smaller cabochon emerald, supported on a necklace of rectangular links set with additional round diamonds, the whole set with approximately 824 round and 8 square-cut diamonds weighing approximately 22.00 carats, mounted in gold, length 18 ¾ inches. 

The emeralds are a medium green and semi-transclucent (not quite as bluish and a bit lighter than indicated by catalogue illustration). The diamonds are approximately G-I color and VS-SI clarity. Heavy, nicely made and 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.