... and another we can't identify - a lovely silver and stone necklace

I also brought back from Arizona this attractive silver and stone necklace - it has no markings and we are puzzled about its’ origin. No marks on the silver to help us identify it - can anyone help please? Is this Hopi tribe work?

<img src=/uploads/db3169/original/1X/a6edd3816643c491e7ca691df6cd40ec2db4de5d.jpg">

This would be tourist jewelry. Just a bunch of different types of rock strung together, similar to the rocks your kids can buy, 10 dollars for a bag full. Thanks for sharing.