Sterling Silver Opal Ring, Blue Opal Ring, Opal Minimalist Ring, 9k Gold, October Birthstone Ring This minimalist ring features a stunning blue Australian opal, which flashes iridescent colours when it is viewed from different angles, when the stone is moved or when the light source is moved. The opal sits atop a skinny silver square band which has melted 9ct gold on each side of the band. Opal is the birthstone for October. Silver square band measures: 1mm Opal gemstone measures: 3mm All UK orders are shipped by 2nd class recorded delivery sterling Silver Opal Ring, Blue Minimalist 9K Gold, October Birthstone Ring