Necklace

Yes I have been busy, another garage sale find , this necklace is broken but I believe it can be easily fixed. There are no markings on the back . I was wondering if the stones are turquoise , or how to tell if they are . It doesn't appear old . I know a lot of people that compete in horse riding events that I am sure they would love it. If the center drop is supposed to be a horseshoe it is upside down , has to be the other way to catch good luck