What about these? http://www.amazon.co....1KLK/ref=pd_rhf_p_t_4 Sapphire is my birthstone and I haven't got any properly blue earrings, only ones are the bit of blue in the peacock eye feather ones . . . but these are more classy for formal events.
When I get Amazon vouchers I am in a complete frenzy until they are spent. Then I notice all the good thing that I could have bought if I had been patient.
Unless there is something that you actually want to buy just leave them for a while. If all else fails buy a birthday present for somebody else.