Shop › Boulder opal and pearl necklace Image 1 of 4 Image 2 of 4 Image 3 of 4 Image 4 of 4 Boulder opal and pearl necklace A$400.00 Solid boulder opal and pearl necklace set in solid sterling silver.Chain is 48cm long.Handmade by me, here in Melbourne. Add To Cart Added! Solid boulder opal and pearl necklace set in solid sterling silver.Chain is 48cm long.Handmade by me, here in Melbourne.