Stunning Vintage Chrysocolla Semi-Precious Stone Bangle

I’m selling a stunning, vintage chrysocolla (maybe malachite?) blue green semi precious bangle bracelet. The stone looks a lot like turquoise, but has a deeper blue. Similar ones are selling on eBay for hundreds of dollars. I found this at an estate sale, along with a banded agate bangle that I am also selling. It may, indeed, be malachite, in which case, it would be worth a lot more, but I really don’t know. :) The opening at the center is small, 2 1/2 inches. Please measure accordingly :-).