These are BIG, BOLD and BEAUTIFUL. Each earring has 6 heart shaped aurora borealis, three blue and three red. Each heart measures ½ inch (top to bottom), the earrings are a little over 1 ¼ inches. The setting is gunmetal black, the earrings are clips and the conjoined YSL with a copy right symbol is on each clip.
Through research I found that this YSL mark is for Carnegie and dates in the 1970’s.