The shapes within the design of the Athena necklace were inspired by the striking forms and characteristics of basalt rocks. Crafted from 9 Karat yellow gold to reflect the unique geometric shapes of basalt that results from its rapid cooling (as it transforms from volcanic magma). Combined with the lustre of the 11mm white South Sea pearl and the bezel-set fine white diamond, the Basalt necklace is a beautiful and distinctive treasure. Matching earrings available.