The tubogas coil construction gives this bangle structural character before the stone even enters the conversation. Italian in origin, the technique creates a flexible spiral form with a spring-like quality that moves naturally with the wrist. Rachel Zoe sets a round cabochon moonstone simulant with soft iridescent adularescence as the focal cabochon in 14K gold over brass - the cool adularescent shimmer of the moonstone simulant against warm gold - an unusual combination with genuine presence. 7-inch wear size with extender. The cabochon format is the right setting choice for this stone: it lets the material's surface character - color, texture, or optical effect - speak without the competition of facets and pavilion reflections.