I didn't look, I bought them directly from a gold kiosk in the mall. The tag is still on the back which says 14K. I will look and if stamped, take a picture.
They are definitely stamped. But of course, whoever made these had to be difficult. The 14K is stamped on the earring post! That's crazy! I will add pics if possible. I'm unsure if my camera is able to focus so close.