Worn here by a mere human, ;) arani are the ceremonial headdress of Ailurian nobility. They're designed to reflect the clan affiliations and social position of the wearer (as well as his or her personality), unless those are so well-known that the noble need not consider them. They're pictured in several of the other Ailurian scenes in this gallery.
This one took me awhile. I wrapped plated copper wire around the innards of pens to make coils, cut the coils to make rings, and assembled the rings in various net-type things. These all have names, of course, but they don't matter unless you're making them. This one also has quartz, malachite and white onyx involved in various places.