For your consideration is a vintage pair of clip on earrings.  These are onyx and are prong set.  They are marked HK.  Research shows Haimes & Klein used this mark in the 1940's and made high end.  I do not know if these are Haimes & Klein, however the estate would have been purchasing at that time and did have high end jewelry.  These were tested and I was told they are gold plated over silver.  Earrings are 3/4" in diameter.

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