Men's Black Opal Ring Platinum Plated, Natural Black Opal Ring Men's Opal Ring's. This ring contains a natural Australian Fire Opal that is dyed black, measuring 4x6mm. This ring is sterling silver and platinum plated, also available in gold plating or rose gold plating.This item includes a velvet gift box and a certificate of authenticity. This item is made to order, please allow about 10-15 days for processing and delivery of this item.