Look closely at October's birthstone, the opal, as it displays a myriad of luminous colors. It is easy to see why Arab cultures believed the opal came to earth in a flash of lightning and the Ancient Romans viewed the enchanting stone as an enduring symbol of hope and innocence. The opal is even believed to foster internal happiness and help the wearer find everlasting love. Opal is also the traditional 14th wedding anniversary gemstone.