Keshi Pearl and Sterling Silver Bracelet

I believe that this bracelet is made with black Keshi pearls, possibly with a titanium coating, although I'm not an expert the pearls are a deep purple with stunning reflects of green, blue, pink and gold in a duochrome effect separating each pearl is a purple faceted glass bead, and they are all strung on a wire the toggle clasp is sterling silver and is marked with a teeny tiny 925 stamp a spring ring clasp has been added to the toggle clasp, I believe by a previous owner, probably as a second layer of security that I don't think is original to the piece ~ I am choosing to leave it as it was found as it can easily be removed apart from a small bit of tarnish on the sterling hardware, this bracelet is in EXCELLENT used condition measures approx 8" in length