Grisaille enamel, used for the Galaxia, is a technique in which successive layers of white enamel are overlaid over a blue or black base – since the white enamel is thickest over
link the lightest areas, the technique produces a much more pronounced sense of depth than conventional enameling. The enamel is applied to a shallow dome,
link which
link rotates over a black disc (for the white gold or pink gold models).