A diamond shape, more complex than it first appears, having two different radiuses at the corners - those in the horizontal plane are more pronounced. Within this elegant form a metal motif on the diagonal suggest an interlocking, tensile structure which also produces the illusion of an apex or ridge. A way to express my continuing fascination with the tastefulness of guilloche - an underlying, usually regular, as here, pattern made by engraving or casting, is infilled with translucent enamel producing a jewel-like, soft effect. A touch of sculptural sophistication, in navy enamel.