Ethiopian Opal Beaded Necklace aad513ba9c7e9c3f32d393e075f4015b and fine metalwork

and fine metalwork

The array of coloration in the layers of onyx is simply amazing

(calcium & fluorine

then washed into the waterways where it can be naturally smoothed and polished

Ethiopian Opal Beaded Necklace aad513ba9c7e9c3f32d393e075f4015b and fine metalworkOpal is composed of hydrated silica. It is an amorphous silicate, meaning it does not form crystals. Opals are structurally composed of tiny spheres of silica, which when arranged in perfect geometry create the famous play of color associated with the stones. The arrangement of silica balls acts like a prism, which allows the rainbow spectrum of colors to be visible to the naked eye. Opal has been a stone of myth and mysticism for thousands of years.