Opal, commonly known as "opalus" (meaning "a stone") in Latin is the birthstone for the month of October. Opal is found in various shimmering colors with elegant flashes of yellow, orange, green and many more. The opal is often considered to be the most beautiful and desirable of all gems because it is highlighted with all the colors of the rainbow.
An alternate birthstone for the month of October is Tourmaline. With its rainbow of colors, tourmaline is an endless source of artistic inspiration and so it is called the "rainbow gemstone".