Opal is a colourful gemstone that is sometimes referred to as the queen of gems. It is a pearl-like white gem with glossy lustre. Opal exhibits a charming interplay of vivid colours throughout its entire surface. It is an exceptional gemstone that produces stunning Birthstone Jewelry. During the month of October, opal is the birthstone. Opal, October Birthstone, looks stunning on display as an Opal Ring, Opal Bracelet, how to tell real opal from fake opal, Opal Earrings or Opal Pendant.