The listing, 10k Gold Earrings has ended.
These are dainty 10k yellow gold earrings. The featured gem is what I always thought was an amethyst but after multiple photos I'm not as sure. They might be "mystic topaz" which I have seen in other listings. There is a second gem on the setting that very well could be a diamond, especially because it is tiny. The stamp is 10k followed by a capital cursive letter L which I think is a makers mark. The gold hoops open by lever and measure 1/2" each way. The setting itself is almost a half inch as well. It took a couple of hours experimenting with zooming and lighting in order to capture the stamp. The last few photos depict the stamp and mark as best as I was able.