Yellow-Green Oval Andamooka Matrix Opal

About Andamooka Matrix Opal

Andamooka matrix opal is opal in which patches or veins of precious opal occur naturally within a darker ironstone or sandstone host. It may show flashes of green, blue, turquoise, yellow, orange or red, often in intricate patterns. The material ranges from opaque to translucent; its play-of-colour comes from the interaction of light with regularly arranged microscopic silica spheres. Opal is hydrated, amorphous silica rather…