Classic Hardware is an online business created by Karyn Cantor that sells a wide range of art related products such as jewellery, Belt Buckles, T-Shirts and Wall art, They collaborate with artists such as Caia Koopman, Angelina Wrona and Simon Sotelo.
Here are a few images to give you an idea of the jewellery they sell:
Website:
http://www.classichardware.com/