I see they've jumped on the plated bronze band wagon which I suppose is cheaper than creating the designs in sterling silver. They must think bronze sounds better than just any old base metal plated with gold or silver, but it's really not a whole lot different to brass, they're both copper-based alloys.
I have a couple of bronze pieces and the metal is lovely (not plated over the top in gold or silver). It wears well and hasn't turned my skin green or black. I wish Q would bring back actual bronze jewellery, it's a nice soft deep coloured metal that would look great as a backdrop for lots of gemstones (imho).