Best Lab Grown Diamond Shapes: The Complete Guide to Cuts & Styles

Most people think picking a diamond shape is pure taste, but it rarely is. Shape ends up tied to personality, to how bold or subtle you want the stone to feel, and even to how you prefer your sparkle — loud, soft, dramatic, or clean.

The truth is, Lab-Grown Diamond Shapes influence almost everything: light, size, even the “character” of the diamond. And with lab grown diamond jewellery becoming mainstream, buyers are paying far more attention to shapes than they did a few years ago.

If you're browsing solitaires or comparing cuts from brands like Lukson diamonds, understanding shape gives you a real advantage before you dive into the details.

Quick things people eventually learn when looking at shapes:

• Round shape diamonds still lead brilliance charts.
  
• Fancy shapes like princess cut diamonds, cushion, radiant — each has its own type of fire.
  
• Step-cuts (emerald and Asscher) behave differently; Emerald diamond cuts aren’t about sparkle but clarity and long flashes.
  
• Elongated shapes — oval, pear, and marquise cut diamond — nearly always look bigger.
  
• Shapes like heart-shaped diamond or pear cut diamond make a statement without trying too hard.
  

If you read just this section, you already know more than most buyers.

How shape affects sparkle, size, and style

Each diamond shape interacts with light differently, and that’s something photos don’t always show accurately.

1. Brilliance:

• Round → highest
  
• Radiant / princess / cushion → strong
  
• Emerald / Asscher → subtle, mirror-like flashes
  

2. Visual size:

Elongated shapes, especially oval, pear, and marquise, tend to look larger for the same carat.

3. Personality:

• Round = classic
• Princess cut diamonds = modern edge
• Emerald = clean and minimal
• Pear cut diamond = expressive chic
• Heart shaped diamond = symbolic and playful

Your choice says something about you, whether intentional or not.

Shape vs Cut — a common confusion

Shape is the outline.
Cut is the craftsmanship.

Two stones may share the same shape but sparkle completely differently if one has a better cut.

When you look at Certified diamonds in India, the labs list shape and cut separately because they measure different things — shape is your design preference; cut is the diamond’s performance. Both matter, but they matter differently.

The popular shapes (with practical notes, not textbook descriptions)

Below are shapes you’ll see everywhere — explained in terms of how they feel to wear, not just how they’re defined.

1. Round Brilliant

Still the standard for sparkle. Easy to wear, universally flattering, and strong in almost every form of lab grown diamond jewellery.

2. Princess Cut Diamonds

A square that’s bold but not loud. Strong brilliance and clean lines. Ideal for people who want a modern shape without giving up sparkle.

3. Cushion Cut

Soft edges, warm glow. Slightly vintage but not old-fashioned. Works well for both solitaires and pendants.

4. Oval

Elegant and flattering on most hands. Looks larger than rounds. Popular in solitaire diamond cuts.

5. Emerald Diamond Cuts

Long, clean lines. No sparkle explosion — instead, a refined “hall-of-mirrors” flash. Minimalists tend to prefer this shape over everything else.

6. Pear Cut Diamond

Half-round, half-pointed. Creates length on the finger. Visually interesting without trying too hard.

7. Marquise Cut Diamond

Dramatic shape with pointed ends. Appears extremely large for its weight — probably the most “statement-driven” diamond shape of all.

8. Heart-Shaped Diamond

Unmistakably symbolic. Works beautifully in pendants or as an expressive engagement ring for someone who wants meaning built right into the gem.

9. Radiant Cut

A blend of structured elegance and strong brilliance. Great alternative to oval or princess if you want contemporary sparkle.

10. Asscher Cut

Structured, geometric, vintage-leaning. Feels composed and deliberate.

Quick comparison — simple, not rigid

These aren’t rules — they’re tendencies.

What buyers want now (2026 outlook)

Trends are shifting, particularly among younger buyers and the custom-design crowd at brands like Lukson diamonds.

• Ovals remain the favourite.
  
• Pears are rising fast in engagement rings.
  
• Emerald and Asscher cuts are part of the minimalist wave.
  
• Marquise cuts — surprisingly — are reappearing in luxury solitaires.
  
• Radiants are becoming the “modern round.”
  
• Cushion cuts stay popular because they’re emotional and warm.
  

India loves sparkle, so round and princess remain strong, but fancy shapes are catching up rapidly.

How to choose the right shape (simple decision-making)

Here’s how most people actually choose shapes — not what guides say, but what happens in real shopping.

1. Style

• Classic → round, oval
  
• Modern → princess, radiant
  
• Minimal → emerald, Asscher
  
• Bold → pear, marquise, heart
  

2. Finger shape

• Short fingers → oval, marquise, pear
• Long fingers → almost anything works

3. Sparkle preference

• Maximum → round, radiant, princess
• Minimal glow → emerald, Asscher, cushion

4. Budget

Rounds cost more. Fancy shapes give more size for the same carat.

• Solitaire diamond cuts
  
• Lab grown diamond jewellery
  
• Round shape diamonds
  

Why certification matters more than shape alone

Even the perfect shape loses its magic if the cut proportions are off. So when buying — especially online — certification becomes non-negotiable.

For Certified diamonds in India, check:

• shape symmetry
  
• cut grade
  
• polish
  
• clarity
  
• bow-tie effects (pear, oval, marquise)
  
• durability factors
  

Elongated shapes must be well-proportioned, or they look unbalanced on the hand.

Also Read: Why Emerald-Cut Lab-Grown Diamonds Are the Shape of the Season

Shape & personality (a small but meaningful detail)

• Round = reliable
• Princess = confident
• Emerald = self-assured
• Oval = graceful
• Pear = creative
• Marquise = expressive
• Heart = sentimental
• Cushion = gentle
• Radiant = modern

Lab-Grown Diamond Shapes give you the flexibility to choose a diamond that reflects who you are — not just what tradition expects.