In spite of a number of reviews saying that these were cheaply made or that the stone barely looked like Turquoise, I purchased these earrings anyway.  Well, those reviewers were correct.  Who knows what this stone really is or how long it will stay in the mounting?  And, can I even be sure this is silver?  I am going to keep them (unless they inflame my earlobes) because I was only looking for a post to wear all the time so that my piercings would stay open. I'm retired and don't wear much jewelry anymore.

Update!  These have held up well and the stone has darkened a bit so they now look like real turquoise.  So, I've changed my rating from 3 to 4 stars.