October's birthstone is opal, a milky stone that flashes every color at once.
Opal has a pale, luminous base that shimmers with darts of green, blue, pink, and gold as it moves. Its color is really a play of many colors, which is what makes it magical.
Opal stands for creativity, imagination, and spontaneity, a natural fit for its ever-shifting surface. It pairs beautifully with soft, dreamy palettes.
The palette
The colors
Colors that have their own encyclopedia page link to it; the rest show their exact hex.