Seven (7) Pair of Clip-On Earrings: Red, Orange, Blue, Green, Black and White +1

All of these were found at the estate sale of a professional jewelry maker. Based on the collection I acquired, I can safely assume the six matching pair are her handmade collection. The screw-back clip on appears to me to be vintage. May or may not be glass, rhinestones and/semi-precious stone. Unknown. Not tested or appraised. They measure about 1”