The birthstone for October is the stunningly iridescent opal.
Opals are formed when water combines with silica from sandstone and seeps through cracks in the earth, and are unique as they are amorphous in nature— meaning they have no defined crystalline structure. Opals are loved for their mysterious beauty and kaleidoscopic play of colour, which refers to the light that passes through the stone and reflects multiple colours colours across its surface.
October birthstone jewellery is not only popular with those born during this month, but those who prefer a more unique feel to their gems. An opal necklace can add a sophisticated touch to casual-wear, while an opal bracelet provides a bit of subtle shimmer, more obvious when layered together. Use a pair of opal stud earrings to accent a day look or a sharp evening look. An October birthstone ring, meanwhile, looks especially good in a yellow or rose gold setting.