Rare, unusual and unique, these Black Opal Sterling Silver Drop Earrings with their superb quality electric black opal stones are the perfect gift for October birthdays! Black Opals are a highly regarded gemstone and are coveted for their rare and unusual electric colour-play! Each stone is a natural wonder formed entirely by mother nature, and can contain a multitude of colours from blues to greens and oranges to reds, meaning the piece you receive is totally unique in size, shape and colour! Otis Jaxon London Women's Black Opal Sterling Silver October Birthstone Drop Earrings