Platinum, Carved Jadeite and Diamond Brooch, Circa 1925.

Set with an oval pierced plaque of brilliant emerald green color, carved in a relief of flower and peach motif, within a platinum frame set with baguette and old European-cut diamonds. Estimate 9,000—12,000 USD. Lot Sold 22,500 USD

Platinum, Jadeite and Diamond Brooch, Black Starr & Frost, Circa 1925. Photo Sotheby's

Composed of carved jadeite plaques of foliate design, set in the center with a marquise-shaped diamond weighing approximately .75 carat, accented by old European-cut, single-cut and window-shaped diamonds weighing approximately 4.30 carats, signed B.S.&F. Estimate 6,000—8,000 USD. Lot Sold 9,375 USD

Sotheby's. Magnificent Jewels,  14 Apr 11, New York www.sothebys.com