The striking forms and characteristics of basalt rocks inspired the shapes and textures within the design of the Basalt necklace. The 9 karat yellow gold has been textured to reflect the unique surface of basalt that results from its rapid cooling (as it transforms from volcanic magma). Combined with the lustre of the 10mm white South Sea pearl and the bezel-set fine white diamond, the Basalt necklace is a beautiful and distinctive treasure. Matching earrings available.