Boulder opal necklace featuring boulder opal beads with flecks of opal colour through the polished ironstone beads combined with the blue tones of the eight pieces of boulder opal. The beads are 4mm diameter, with the centre eight pieces of opal each measuring 9mm x 5mm . The necklace is finished with a sterling silver toggle clasp (with an extension) and the entire length of the necklace measures from 48cm to 50cm.