The kite cut is a fancy-shape outline in which the cut stone takes the form of a quadrilateral with two pairs of equal adjacent sides and two unequal axes of length, producing the characteristic asymmetric four-sided silhouette of a flying kite. It is not, properly speaking, a single facet pattern but a family of outlines on which step, brilliant or modified-brilliant facet arrangements may be cut. The shape is most commonly encountered in diamond and is used in custom and alternative bridal work, as a side-stone accompaniment in three-stone rings, and as a vehicle for orientation-sensitive designs in coloured stones.

Geometry

A canonical kite has an upper short pair of sides meeting at an apex, a lower long pair meeting at a more acute apex, and two unequal angles at the side points where the pairs meet. The line connecting the two apex points is the long diagonal of the stone; the line connecting the two side points is the short diagonal. The ratio of these diagonals defines the proportions of a particular kite, with elongated kites favouring a long-to-short ratio of around 1.7:1 and broader, lozenge-leaning kites approaching 1.2:1. Kites are not symmetrical along both axes, which distinguishes them from rhombus or lozenge cuts, in which all four sides are equal.

Faceting variants

The two principal faceting traditions on kite outlines are the step-cut kite, in which trapezoidal facets parallel the perimeter, producing the open, hall-of-mirrors look familiar from emerald cuts, and the brilliant-cut kite, in which a kite-shaped table is surrounded by triangular and kite-shaped crown facets in the manner of a modified princess. Step-cut kites are favoured in modern minimalist bridal work and respond best to high-clarity material because the open facets reveal inclusions readily. Brilliant-cut kites suit slightly lower clarity and produce a livelier scintillation pattern at the cost of the linear elegance of the step.

Use in jewellery

Kite-cut diamonds appear most often as accent stones flanking a centre in three-stone rings, where their asymmetric outline can be oriented to point inward or outward depending on the design intent. They are also used as solitaires in alternative or non-traditional engagement rings, frequently set east-west with the long diagonal horizontal across the finger. In coloured stones, kites are sometimes preferred for sapphire and tourmaline rough that does not yield well to symmetrical outlines, since the asymmetric shape allows a cutter to retain weight from a difficult crystal.

Grading and certification

The GIA reports kite-cut diamonds under fancy-shape parameters without an overall cut grade, providing instead measurements, polish, symmetry and the standard 4Cs. There is no industry-standard ideal for kite proportions, and the trade therefore relies on ratio and visual assessment in place of a numeric cut grade. Symmetry mismatches between the four sides are the most common faulting on kite outlines and are the principal cause of return for bench-set stones.