This pretty and delicate band, made of 14k recycled gold and set with five round bezel set opals, is from Israeli designer Orit Naar. Available through Etsy, it is USD $425 and custom made.

There are a number of lovely, wearable items in gold and silver on the site (though I have a soft spot for opals…). This one is pictured with a plain gold band and looks really nice worn stacked.