A colorful, very high quality, raw Mexican Fire Opal has a bright rainbow colored flash. It is hand set into Sterling Silver bezel and sits on a simple half-round Sterling Silver band. Ring is a size 7 This ring is one of a kind and can not be re-sized. Please message me about other stones I have on hand for custom orders. The stone 20mm +++Fire Opal was born in fire, in the ancient volcanoes of Mexico. Fire opal forms when water seeps into silica-rich lava, filling seams and hollows. Fire Opal is a stone of sensuality and sexuality, and is said to enhance fertility. The Mayas and Aztecs loved this gemstone and liked to use it in mosaics and for ritualistic purposes+++