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Knoll & Pregizer KP Germany Sterling PasteDouble Clip Brooch
c.1930. Sterling silver. This is two dress clips attached to a frame and worn as a brooch. The stones were yellow and dull in horrible condition but they were in open back settings. I soaked it in a bath of vinegar and salt removing all the foil. You would never know this was not platinum and diamonds. I love the mixture of the geometric cuts of stones. Double clip brooches were made by practically every jeweler in the 1930s up to the 1950s whether in real or costume.

If the stones are in CLOSED back settings and they are yellow or greenish, there is NO way to clean them regardless of what a dealer tells you. Yellow,dull stones means there is foil damage and the only fix is to have the item re-stoned or live with it. Since these vintage stones are not made anymore and are of a different cut than a modern rhinestone,I would think very carefully about spending a lot of money for a piece that is not in great condition. Yellow is damage and decreases the value of the piece.
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