Opal, considered the "queen of gems," can flash patterns of color representing every hue of the rainbow. Believed by ancient peoples to actually contain fi re, opal has long been ascribed many mystical and healing properties. The rainbow of fire is produced by the diffraction of white light through a microstructure of silica spheres. Each size sphere refl ects light of a different wavelength. This sterling silver cross pendant necklace is set with an inlay of a matrix of iridescent white opal. Handcrafted by Leon Nussbaum, our London silversmith, and hallmarked for a guarantee of purity, the cross will appear to flicker and change with every movement of the wearer. 1.375" high on 18" sterling silver chain.