18kt White Gold Pink Opal 'Alma' Ring. The Opal ring in 18ct yellow gold by acclaimed designer Eva Nueva. This fabulous designer ring features a large cabachon pink opal measuring approximately 28mm, This stunning baby pink opal highlighted by the bright 18ct white gold. The organic opal shape makes this an exceptionally stylish ring. This designer ring is available exclusively from the La Scala Online Jewellery Boutique. Available in 18ct yellow gold