Here I am pleased to offer my unique Lightening Ridge picture opal that looks like a stormy sky. It flashes red, yellow and green in direct sunlight and has a grey base. The opal itself is 2.75 carats and the pendant measures 20mm x 12mm wide and weighs 1.4g. It's simple but beautiful and comes with a 14" sterling silver snake chain and 9 carat gold filled connectors. Nature definitely created a work of art with this one. Other chains are available but this chain suits the setting better.