Adorable! Double Koala bear brooch by Graff!
Fancy yellow & colorless diamonds with estimated weight of 19.75 carats
Yellow diamonds range from fancy yellow to vivid yellow color. Eyes & nose is set with cabochon onyx.
With makers hallmark:
 
GRAFF Measurements:
Length: 1.75 inches
Width: 1.5 inch (individual koala bear) 3 inches (koala bears together)