Thanks for asking! I'm a 52 year old guy and this is not my area of expertise by any means... I haven't a clue...lol... to me, they're pretty blue rocks...lol Wish I could be more help!
The pic's as clear as it can get at that size, and exactly what kind of description do you want when I have no further information? Would you like me to make up some story like they were hand made by Tibetan monks on the spring equinox out of some King's jewels or something? It's just a pair of pretty blue earrings.... bid accordingly or move on...