Beautiful blue opal pendant - slightly translucent Owyhee Opal Owyhee Opal is the rarest of all opals and is only found in Oregon, USA near the sacred springs of the Qwyhee River. You get exactly this pendant you see in the pictures! unique piece ! Not every opal has the lively play of colors of the variant known as precious opal. However, the stone type opal is found worldwide in a wide variety of colors without the opalization caused by small pebbles.