Every diamond we set is chosen against the four traditional criteria — cut, colour, clarity, and carat — but the most important measure is the one you cannot grade: presence.
The most decisive of the four — cut governs how a diamond releases light. We favour proportions that maximise brilliance and quiet fire.
From colourless (D) to warm champagne (Z), colour is a matter of taste. Our signature settings favour the D–G range for icy transparency.
Inclusions are nature's fingerprint. We select stones from VVS to VS clarity — eye-clean, luminous, and rich in character.
Weight, not size. A well-cut smaller diamond will often out-shine a larger one. Balance carat with cut for the greatest presence.
Shape is the first decision — and the most personal. Each outline handles light differently, wears differently, and says something different about the woman wearing it.
The most enduring and most brilliant of all cuts, engineered purely for the return of light. Its symmetry forgives more than any other shape, which is why it accounts for the majority of engagement rings. Choose it when maximum sparkle is the brief.
A crisp square silhouette with brilliant-style faceting beneath the table. It delivers modern geometry without sacrificing fire, and retains more rough than a round, so it reads larger per carat. A confident, contemporary choice.
Softened corners and generous facets give the cushion its candle-lit glow. Antique in lineage yet perfectly at home in modern settings, it favours warmth over sharp brilliance. Ideal for romantic, vintage-leaning designs.
An elongated brilliant that flatters the finger and appears larger than a round of equal weight. It carries almost the same light return with a slender, elegant line. A favourite for those wanting presence with restraint.
A step cut defined by long, mirror-like facets that flash rather than sparkle. Clarity matters most here, as the open table conceals nothing. Understated, architectural, and quietly the most sophisticated shape in the case.
Half round, half marquise — a teardrop that draws the eye along the hand. Symmetry is everything; the point should align precisely with the rounded end. Striking in pendants as much as in rings.
The longest silhouette per carat, tapering to two fine points. It maximises apparent size and elongates the finger dramatically. A distinctive, regal shape for those who prefer to be remembered.
Cropped corners with full brilliant faceting — the strength of an emerald outline with the fire of a round. It hides inclusions well and holds colour beautifully. A versatile bridge between step and brilliant cuts.
A square step cut with deep, concentric facets creating an endless hall-of-mirrors effect. Born of the Art Deco era and still unmistakably of it. Best in high clarity, high colour stones with clean lines around them.
The most openly sentimental of the cuts, and the most demanding to execute. Balance between the lobes and a crisp cleft define its quality. Best at half a carat and above, where the outline reads clearly.
A slender rectangular step cut with long, clean facets and a quiet, architectural presence. Traditionally set alongside a centre stone, it lends structure and light without competing. Precision of outline is everything.
Triangular-shaped diamond with pointed corners, high brilliance. The Trillion cut features a bold triangular silhouette with sharp corners and exceptional brilliance. Popular as a side stone or statement centerpiece for modern, edgy designs.
The Classic Star cut is a rare, symmetrical design faceted into a true star silhouette. Its uncommon shape makes it a standout choice for unique, one-of-a-kind jewellery pieces.
The Starburst cut combines a brilliant centre with radiating star-like facets, producing an intense, fiery sparkle unlike any traditional shape. A modern, artistic choice for those wanting maximum light play.
A trilogy setting is a study in proportion — the centre stone sets the tone, and the two shoulders decide whether the piece reads classical, architectural or romantic.
The classical arrangement — three brilliants in perfect alignment, past, present and future. Light travels evenly across all three stones, so the eye reads one continuous line of fire.
Tapered triangular shoulders draw the eye inward to an elongated centre. The most flattering of the trios on the hand, and the one that reads largest for its weight.
Step cut beside step cut — an architectural, Art Deco composition built on clean lines rather than sparkle. Clarity is everything here, on all three stones.
Petal-like and unmistakably romantic. The outward-facing side stones widen the setting across the finger while keeping the silhouette soft.
Every brilliant diamond begins as a rough natural or laboratory-grown crystal. Through expert craftsmanship, precision engineering, and advanced technology, each stone is transformed into a masterpiece that maximises brilliance, fire, scintillation, and sparkle.
Every Luck Xiour diamond arrives with an independent grading report from a recognised gemmological laboratory. Beyond the paper, our gemmologists inspect each stone in person — because a certificate can describe a diamond, but only the eye can love one.
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