Collection: Boulder Opal Necklaces

Unlike solid opals, boulder opals are naturally fused to fragments of their host rock—known as matrix—that become part of the stone's character. Often this matrix is ironstone, creating rich earthy tones and dramatic contrasts. While some boulder opals show a "clean face" with the matrix only on the back, many display varying amounts of matrix inclusions floating through the opal itself, adding unique patterns and depth. Pieces from Quilpie, Australia often showcase solid ironstone backing visible from behind the stone.

Koroit boulder opals take this artistry further, revealing intricately patterned ironstone threaded with delicate veins or bursts of precious opal, like a natural painting brought to life. Each boulder opal necklace at OpalPop is a wearable piece of geological wonder—no two are ever the same.