Artisan necklace, layered links, sterling silver and goldfill

This is a necklace I picked up at an artisan jewelry store in Kelowna a number of years ago. It's made of overlapping organic "hoops" dotted with little bumps and hammered flat, with textured silver spacer beads in-between. The construction is entirely sterling silver (some of which has been oxidized to a dark grey), with the exception of two gold-fill hoops for a lovely mixed-metal look. The section of hoops is approximately 3" wide and 1" tall, and the necklace is about 16.5" long in total (so the hoops sit right at the base of the neck).