Diamond Shapes Guide — The Net Jeweler
Education Series
The Art of the
Diamond Shape
Before the setting, before the metal, before the carat weight — shape is the first decision, and the one that defines everything else.
Where every ring begins
Shape, character, and the story your ring tells
Long before questions of colour, clarity, or carat weight arise, shape determines how a diamond captures and returns light, how it appears on the hand, and what it quietly communicates about the person who wears it.
At The Net Jeweler, we have been guiding clients through this conversation since 1967. In that time, we have come to understand that the choice of shape is rarely purely rational — it is intuitive. A client often arrives knowing the feeling they want before they know its name.
This guide is designed to give that feeling a vocabulary. To help you move from instinct to informed decision, and to walk into your consultation knowing exactly what you are looking for.
"A diamond's shape is not merely aesthetic preference — it is an expression of character. The classic romantic and the modern minimalist each find their answer in a different silhouette."
Diamond shapes fall into two optical families. Brilliant cuts — Round, Oval, Cushion, Pear, Marquise, Princess, Radiant — use triangular and kite-shaped facets to maximise the return of white light. They scatter, sparkle, and dance.
Step cuts — primarily the Emerald — use long parallel facets that descend in concentric tiers. They do not scatter light; they reveal it. The result is a serene, mirror-like transparency gemologists call the hall of mirrors effect.
Both families are beautiful. Both serve different clients and different personalities. The eight shapes that follow represent the full spectrum of what is available — and what is possible — when you choose a diamond from our collection.
The eight essential shapes
Diamond shapes, defined
Each shape has a distinct optical character, a distinct personality, and a distinct relationship with the hand that wears it.
01 of 08
Round Brilliant
The timeless standard — unrivalled in light performance
The Round Brilliant is the most precisely engineered diamond shape in existence. Its 57 or 58 facets — refined over more than a century of optical study — maximise the return of white light (brilliance), spectral colour (fire), and dynamic sparkle (scintillation) in perfect balance. No other shape adapts with equal grace to every setting, metal, and aesthetic. It is the shape against which all others are measured, and for good reason: consistent, all-directional brilliance that no cutting approach has yet surpassed.
- Brilliance — highest of any shape; facet geometry designed expressly for maximum light return
- Universally flattering — the circular outline balances all finger proportions
- Colour masking — disguises warmth tints more effectively than step cuts
- Inclusion concealment — scintillation makes inclusions far harder to detect
- Flexibility — the most liquid shape; easiest to resize, reset, and appraise
02 of 08
Princess
Modern geometry — brilliant fire in a clean square form
The Princess cut is the definitive expression of contemporary brilliant cutting. Developed in the 1970s, its square outline and pointed corners produce a distinctive chevron-patterned sparkle quite different from the Round's circular light return. Its facets generate exceptional fire — the spectral dispersion of white light into colour — and its precise geometric silhouette pairs naturally with modern settings: channel-set bands, angular bezels, and architectural solitaires.
- Brilliance — second only to Round; distinctive cross-shaped sparkle pattern
- Value — less rough is lost in cutting than a Round; often a better price-per-carat
- Face-up size — pointed corners maximise the visible diameter
- Finger flattery — square geometry creates a slimming effect on wider fingers
- Setting note — pointed corners require V-prong or bezel protection in daily wear
03 of 08
Oval
Elongated grace — the illusion of size with brilliant warmth
The Oval is the Round Brilliant's most gracious relative — sharing its facet architecture and extraordinary light performance, yet offering an elongated silhouette that creates a meaningfully different presence on the hand. A well-cut Oval appears noticeably larger than a Round of identical carat weight, and its length creates an elegant slimming effect that many clients find more flattering than the perfectly circular Round. It is a shape that marries timeless brilliance with a distinctly contemporary sensibility.
- Apparent size — appears 10–15% larger face-up than a Round of the same weight
- Brilliance — nearly matches the Round; exceptional light performance
- Finger flattery — pronounced lengthening and slimming effect on the hand
- Durability — no pointed corners; more resilient than Marquise or Pear in daily wear
- Best proportion — seek a length-to-width ratio of 1.35–1.50 for the most balanced oval
04 of 08
Cushion
Warmly luminous — the romantic shape with centuries of history
The Cushion cut traces its lineage to the old mine-cut diamonds of the eighteenth and nineteenth centuries. Its square or gently rectangular outline, defined by softly rounded corners, gives it a warmth that purely geometric shapes cannot match. The contemporary Cushion exists in two styles: the Classic, whose large facets produce a warm, chunky sparkle, and the Modified, whose dense facet arrangement creates a crushed-ice brilliance of remarkable beauty. Understanding which variant you prefer before purchasing is essential.
- Proportions — square (1.0–1.09) or rectangular (1.15+); specify your preference
- Two optical styles — Classic produces warm chunky light; Modified produces crushed-ice brilliance
- Setting synergy — exceptional in halo settings; most natural in vintage-inspired designs
- Colour note — retains warmth slightly more than Round; consider G or above in white metal
- Durability — softly rounded corners require no special prong protection
05 of 08
Emerald
Architectural clarity — the intellectual's diamond
The Emerald cut belongs to the family of step cuts — its long, parallel facets descend in concentric rectangular tiers, creating what gemologists describe as a hall of mirrors effect. It does not sparkle in the way a brilliant does; it glows. Those broad, still flashes of light — slower and more considered than a brilliant's constant dance — convey a particular cool confidence that no other shape matches. The Emerald is the choice of those who have looked carefully at diamonds and know exactly what they prefer.
- Optical character — hall-of-mirrors glow; broad serene flashes rather than scintillating sparkle
- Clarity standard — step facets reveal inclusions readily; recommend VS2 or higher
- Colour standard — retains warmth more visibly; consider G or above in white settings
- Finger flattery — the elongated form creates a dramatically slimming, lengthening effect
- Durability — bevelled corners (octagonal outline) provide inherent structural protection
06 of 08
Pear
Dramatic, distinctive, and tenderly romantic
The Pear — also called the teardrop — is a brilliant cut that unites the pointed tip of the Marquise with the softly rounded base of the Oval. Worn with the point toward the fingertip, it creates a pronounced elongating effect; worn with the point facing inward, it carries an intimate, personal symbolism. The Pear demands a skilled cutter — asymmetry or a prominent bowtie shadow can diminish an otherwise fine stone. When well-executed, no other shape announces itself with quite the same combination of drama and grace.
- Best proportion — length-to-width ratio of 1.45–1.75 for the most elegant silhouette
- Setting essential — the pointed tip always requires a V-prong or bezel to prevent chipping
- Bowtie check — examine in person or video; a dark bowtie shadow indicates poor proportioning
- Versatility — beautiful as a ring centre stone, pendant, or drop earring
- Finger flattery — one of the most pronounced elongating silhouettes of any shape
07 of 08
Marquise
Commanding, historical, and unmistakably singular
The Marquise carries one of the most distinguished histories of any diamond shape — named for the Marquise de Pompadour and cut for Louis XV, it has graced the collections of royalty and connoisseurs for nearly three centuries. Its elongated ellipse with two tapered points creates the largest face-up surface area of any shape relative to carat weight, making it appear dramatically larger than its weight would suggest. On the hand, it is unmistakable: a shape that commands attention and signals a confident, knowing relationship with fine jewellery.
- Apparent size — greatest face-up area of any shape; appears 15–25% larger than a Round of equal weight
- Setting essential — both pointed tips require V-prong protection to prevent chipping
- Best proportion — length-to-width ratio of 1.85–2.10 for the most classical balance
- Bowtie check — examine in person or video; a strong bowtie shadow is common in poorly cut examples
- Finger flattery — one of the most dramatic finger-lengthening effects of any shape
08 of 08
Radiant
The best of both worlds — brilliant fire in a rectangular form
The Radiant cut was invented in 1977 by master cutter Henry Grossbard, who sought to resolve what he saw as a false choice: between the Emerald's elegant rectangular silhouette and a brilliant cut's light performance. The result — a rectangular shape with trimmed corners and 70 or more brilliant-cut facets — produces a crushed-ice sparkle quite unlike the Emerald's serene depth. The Radiant is energetic, modern, and exceptionally versatile: it pairs naturally with both round and square side stones and suits virtually any setting style.
- Facets — 70+ facets produce exceptional brilliance and fire; among the liveliest of all shapes
- Proportions — available square (1.0–1.05) or rectangular (1.2–1.5); specify clearly
- Colour masking — hides warmth far more effectively than the Emerald; allows grade flexibility
- Durability — trimmed corners provide structural protection; no special prongs required
- Setting synergy — pairs exceptionally with baguette or trapezoid side stones
Finding your match
How to choose the shape that is right for you
Shape is rarely a purely aesthetic decision. Personal style, the proportions of the hand, and the setting you envision all influence which silhouette will feel most natural and most right. The guidance below is a starting point — not a prescription.
By personality
The Classic Romantic
You are drawn to timeless forms and enduring beauty. The Round Brilliant is the definitive answer — chosen by discerning clients for a century, and one that will remain relevant for centuries more. The Oval offers the same brilliance with a quietly modern elongation.
By personality
The Modern Minimalist
Clean geometry and architectural confidence are your aesthetic language. The Emerald's hall-of-mirrors transparency is the most design-forward choice in fine jewellery. The Princess and Radiant offer the same precision with considerably more sparkle.
By personality
The Vintage Enthusiast
You are drawn to Art Deco filigree and the romance of periods past. The Cushion echoes old mine cuts of the nineteenth century. The Marquise carries three centuries of French court history. The Pear pairs exquisitely with milgrain and delicate pavé.
By personality
The Bold Individualist
Your jewellery is an unmistakable expression of character. The Marquise in a commanding solitaire. An east-west Pear. A large Radiant in a minimal bezel. Shapes that invite conversation and reflect a confident, knowing relationship with fine jewellery.
By hand shape
Shorter or Wider Fingers
Elongated shapes create a pronounced lengthening effect. The Oval, Marquise, Pear, and Emerald are all excellent choices worn lengthwise along the finger. The Princess also adds welcome geometric structure. Avoid very squat, wide proportions.
By hand shape
Longer or Slender Fingers
Slender fingers carry almost any shape beautifully. The Round, Cushion, and Princess are particularly harmonious. A halo setting or split-shank band adds pleasing width — options that can feel overwhelming on a narrower hand but are perfectly at home here.
At a glance — shape comparison
| Shape | Brilliance | Apparent size | Finger elongation | Min. clarity | Character |
|---|---|---|---|---|---|
| Round Brilliant | Standard | Neutral | SI1+ | Timeless, universal | |
| Princess | Slightly larger | Slight | SI1+ | Modern, geometric | |
| Oval | Larger | Pronounced | SI1+ | Elegant, contemporary | |
| Cushion | Standard | Slight | SI1+ | Romantic, vintage | |
| Emerald | Larger face-up | Very pronounced | VS2+ | Architectural, cool | |
| Pear | Larger | Very pronounced | SI1+ | Dramatic, romantic | |
| Marquise | Largest of all | Very pronounced | VS2+ | Bold, historical | |
| Radiant | Larger | Moderate–High | SI1+ | Versatile, modern |
The Net Jeweler · Montréal since 1967
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