Shop Opal Gemstone & Natural Opal Cabochons The opal stone, also called the 'Queen of Gems', is nature’s very own kaleidoscopes — these constantly shifting colors and ethereal glow are no wonder that they captivate the world’s attention. If blues and reds written in fire and greens shifting in light each have a universe within them, then so does the stone. Aside from their beauty, opals have a history and opal meanings beyond that. Opal stones are truly works of art. It's hard to resist such a vibrant stone that displays a wide range of fancy rainbow-coloured patterns. It's hard to believe how it belongs to the silica mineral family, which includes cristobalite and quartz, and still looks so heavenly. Opals are a stone that has been popular forever. This October birthstone is never out of style. It sets the trend. Opal stones come in a lot of variety, and every stone is one of a kind. Opals are very easy to identify. Not every gem has a white, pearly appearance and is translucent to opaque. Opals are available in so many colors, and each of them is stunning.