leather in dressy jewelry?

Leather isn’t neccessarily the first material I think of when someone says “jewelry” – however, there are some really great pieces out there!
Some, like this “Ombre” cuff bracelet by Cara Accessories, are mostly leather:

Others just have leather as an accent, like this “Heart Padlock” bracelet from Juicy Couture:

Or it may even be used so that it doesn’t look like leather, like these funky leather cord & silver bracelets from Simon Sebbag:

images: Nordstrom