Coro created a series of "birth flowers" in the late 1940s. Aster and morning glory are the traditional September favorites. Morning glory definitely yielded an exceptionally pleasing design. I was sure for years that this brooch was sterling silver--it tarnishes over time. It's just very good silver-plate. The glass jewels, too, are fabulous foolers for sapphire: sparkly and discernibly blue. The brooch is 2 and 3/8 by 1 & 5/8 inches and in excellent condition. Wiki says: "It is believed that the Romans started celebrating birth and birthdays using flowers. The language of flowers was introduced to England in the early 18th century by Mary Wortley, Lady Montague."