An interesting scientific fact about white opals is that they consist of silica spheres packed in a grid-like pattern. This arrangement causes light to diffract and create the stone’s trademark play-of-color. The play-of-color varies depending on the arrangement and size of the silica spheres: smaller spheres typically produce blues and greens, while larger ones might result in reds and oranges, making each opal unique with its own spectral signature.
