The hexagonal step cut is a faceting style in which a gemstone is fashioned with a regular six-sided girdle outline and dressed with concentric rows of elongated, rectangular facets arranged in parallel tiers on both crown and pavilion. Each row of facets runs parallel to the nearest girdle edge, so the entire surface resolves into a series of receding planes that draw the eye inward — an effect lapidaries sometimes describe as a hall of mirrors. The result is a cut of pronounced geometric character: orderly, architectural, and well-suited to stones whose primary appeal lies in depth of colour or exceptional transparency rather than in the scintillating light-scatter associated with brilliant cuts.

Relationship to the Step-Cut Family

Step cuts as a broad category are defined by their parallel, tier-like facet arrangement and their tendency to produce broad, glassy reflections rather than the rapid sparkle of brilliant-style cutting. The emerald cut — a rectangular or square outline with cropped corners — is the most widely recognised member of this family; the hexagonal step cut occupies a cognate position, substituting a six-sided perimeter for the four-sided one. Other step-cut outlines include the square (carré), the trapezoid, the triangle, and the octagon, each sharing the same fundamental facet logic while offering a distinct silhouette. The hexagonal outline is geometrically distinctive in that its six equal sides and interior angles of 120 degrees give the stone a natural affinity with the trigonal and hexagonal crystal systems — a correspondence that has made the cut a traditional choice for aquamarine, tourmaline, and certain sapphires, all of which crystallise in those systems.

Facet Architecture and Optical Behaviour

In a well-executed hexagonal step cut, the crown typically carries two to four rows of step facets above the girdle, converging on a flat or very slightly domed table. The pavilion mirrors this arrangement below, with rows stepping down toward a small, elongated culet or a linear keel facet. The girdle itself is usually polished and of moderate, even thickness. Because the facets are broad and planar rather than small and angled for dispersion, the cut is highly revealing of internal characteristics: inclusions, colour zoning, and any optical anomalies are visible to the naked eye in a way that a brilliant cut would largely conceal. This transparency to the interior is simultaneously the cut's greatest virtue and its most demanding quality criterion — only stones of high clarity or those whose inclusions are aesthetically neutral benefit from it without compromise.

Colour saturation is generally enhanced by the step-cut geometry. The longer light path through the deeper, parallel-sided pavilion allows colour to build more fully than it would in a shallower brilliant-cut stone of equivalent weight. For strongly pleochroic gems such as tourmaline or tanzanite, the cutter's orientation of the rough relative to the crystallographic axes becomes especially consequential: the hexagonal outline offers six potential orientations for the table, each of which may present a subtly different hue to the observer.

Gemstones Commonly Cut in This Style

• Aquamarine: The pale to medium blue of fine aquamarine is well served by a step cut's ability to concentrate colour, and the hexagonal outline echoes the gem's natural prismatic crystal habit. Large, clean aquamarine crystals from Brazil, Pakistan, and Mozambique are frequently fashioned this way when the rough permits.
• Sapphire: Blue sapphires of high clarity, particularly those from Sri Lanka and Madagascar, are sometimes cut in hexagonal step form when a cutter wishes to preserve a naturally hexagonal crystal section or to emphasise a particularly even, saturated blue. The cut is less common for Burmese material, where the premium on carat weight and the prevalence of silk inclusions tend to favour other styles.
• Tourmaline: The wide colour range of tourmaline — from Paraíba-type cuprian elbaite to chrome-bearing green varieties — and the gem's strong pleochroism make the hexagonal step cut a useful tool for colour management. The broad table and parallel facets allow the dominant hue to read clearly.
• Morganite and other beryls: Pink to peach morganite, golden heliodor, and green beryl are all cut in hexagonal step form, again partly because beryl's own crystal habit is a six-sided prism and the outline may be cut from a natural cross-section with minimal waste.
• Amethyst and citrine: Large, clean quartz material is frequently fashioned in geometric step cuts for decorative and collector purposes, and the hexagonal outline appears regularly in both antique and contemporary production.

Historical and Design Context

The hexagonal step cut has roots in the broader European tradition of geometric gem cutting that flourished from the sixteenth century onward, when lapidaries began systematically exploring non-circular outlines. By the late nineteenth and early twentieth centuries, advances in mechanical cutting equipment allowed more precise execution of complex polygonal outlines, and the hexagon became a recognised option in the repertoire of specialist cutters working for the major jewellery houses.

The Art Deco period (roughly 1920–1939) gave the hexagonal step cut particular prominence. The movement's preoccupation with geometric abstraction, Cubist influence, and the visual language of machinery found a natural expression in the clean, rectilinear facets and the unambiguous six-sided silhouette of the hexagonal step cut. Brooches, clips, and ring mounts of the period frequently incorporated hexagonally cut aquamarines, rock crystal, and coloured sapphires as central or accent stones, their flat-topped geometry integrating seamlessly with the angular platinum and white-gold settings of the era.

Contemporary jewellery design has returned to the hexagonal step cut with renewed interest, driven partly by a broader appreciation for geometric and architectural aesthetics and partly by the influence of independent designers who favour unusual outlines as a point of differentiation. The cut appears in both fine jewellery and in the collector market for precision-cut coloured stones, where cutters based in Germany, Thailand, and the United States produce hexagonal step cuts to exacting tolerances as display pieces in their own right.

Cutting Considerations and Quality Evaluation

Achieving a well-proportioned hexagonal step cut requires careful planning at the rough-stone stage. The cutter must establish a true regular hexagon at the girdle — any deviation from equal side lengths or angles will be immediately apparent in the finished stone — and must then maintain the parallelism of facet rows across all six sides simultaneously. Symmetry is evaluated both in the outline (equal sides and angles) and in the facet tiers (consistent step heights, sharp facet junctions, and an even, undistorted table). Gemmological laboratories assessing cut quality in step-cut coloured stones typically examine these parameters under magnification and in reflected light.

Polish quality is especially important in step-cut stones because the broad, planar facets act as mirrors: any scratches, pits, or surface irregularities are visible as distortions in the reflected image. High-quality hexagonal step cuts are finished to a bright, flat polish on each facet, with crisp, straight junctions between adjacent tiers.

Proportions — the ratio of crown height to total depth, and the relative widths of the step tiers — affect both the optical character and the apparent colour of the finished stone. A deeper pavilion generally intensifies colour but may cause a dark, windowed appearance in lighter-toned material; a shallower cut risks a washed-out, pale centre. Experienced cutters balance these variables against the specific refractive index and colour saturation of the individual rough.

In the Trade

In the coloured-stone trade, hexagonal step cuts are considered specialty items rather than standard commercial cuts. They command a premium when executed with high symmetry and fine polish, and they are sought by collectors of precision-cut gems, by designers working in geometric idioms, and by buyers who appreciate the historical resonance of the style. Because the outline is less forgiving of rough-stone irregularities than a round or oval brilliant, and because the step-cut facet arrangement demands high clarity, the yield from rough is often lower than for more accommodating cutting styles — a factor reflected in the price of well-cut examples.

When purchasing a hexagonally step-cut stone, buyers are advised to examine the gem face-up for symmetry of outline, evenness of colour distribution across the table, and the quality of the step reflections. A fine example will show clean, parallel bands of light and dark alternating across the crown — the characteristic hall of mirrors effect — without distortion or uneven windowing. Laboratory reports from recognised gemmological institutions can confirm species, treatment status, and, for significant stones, origin.

Further Reading

• GIA Gem Encyclopedia — gia.edu
• International Gem Society: Step Cuts — gemsociety.org