A Colombian emerald and diamond pendant

Platinum, stamped: 89749
Centering a pear-shaped emerald with GIA report #5191758526 dated October 25, 2018 stating 11.55 cts., natural emerald with Colombian origin and minor clarity enhancements (F1) surrounded by twelve pear, thirteen round and four marquise-cut diamonds totaling approximately 12.50 cts. and graded D-G color, VS clarity, the largest pear-shaped diamond with GIA report #5191760270 dated October 9, 2018 stating 0.83 ct. and D color, VS2 clarity, the other diamonds in the lot are of a similar color and clarity

A Sterlé 18k yellow gold and diamond brooch

Circa 1961, stamped: Modele / Sterlé / Paris / (c) Montreaux / 18K
Designed 1958 by Sterlé, manufactured by Montreaux New York, set with fifty-three full-cut round diamonds totaling approximately 4.30 cts. and graded G-H color, VS clarity

Notes: A similar brooch illustrated: Jutheau, Viviane, and Pierre Sterle. Sterle: joaillier Paris. Paris: Editions Vecteurs, 1990

A Paulding Farnham for Tiffany & Co. enamel and diamond orchid brooch

1889-1896, stamped: Tiffany & Co. / 1157
Oncidium sphacelatum, polychrome enamel on a yellow gold cage set with one old mine-cut diamond gauged at approximately 0.50 ct. and graded H-I color, VS clarity, further set with eleven old mine-cut diamonds graded H-I color, VS clarity, with certificate from Tiffany Archives