Pink Opal is a natural, pink colored gem-variety of the Common Opal which is composed of Opal, Palygorskite and Chalcedony. This slightly translucent to opaque gemstone is valued for its unique pink hue, pleasing lustre and high durability rather than the play of color.
Peruvian opal (also called blue opal) is a semi-opaque to opaque blue-green stone found in Peru, which is often cut to include the matrix in the more opaque stones. It does not display a play of color. Blue opal also comes from Oregon and Idaho in the Owyhee region, as well as from Nevada around the Virgin Valley.