There’s something a bit magical about watching someone slip on a diamond ring for the first time. I’ve seen it happen dozens of times — friends choosing engagement rings, couples debating cuts under bright showroom lights, even curious shoppers who weren’t planning to buy anything but ended up swooning over a sparkle they didn’t expect. And one thing I’ve learned along the way is this: the cut of a diamond has more power than people realise.
Not the size, not the colour — the cut.
It’s the part that turns a stone from “pretty” into “wow, that’s incredible.”
These days, with lab made diamonds becoming such a massive part of the jewellery landscape in Australia and around the world, more people are navigating the world of lab grown diamonds cuts for the very first time. And you know what? It can get confusing quickly. Some cuts look similar, some have dramatic differences, some sparkle like crazy, and some give off this understated, quiet kind of elegance that sneaks up on you.
So I thought I’d put everything I’ve learned into one place — not in that stiff, textbook style you see on some jewellery sites, but in a more grounded, real-talk way. Think of this as the guide I wish someone handed me years ago.
Why the Cut Matters More Than You Think
I’ll be honest — years ago, before I knew much about diamonds, I assumed size was everything. (A bit embarrassing to admit now.) But if you talk to any jeweller, they’ll tell you the cut is the heart and soul of the stone.
Cut is what determines:
- how brightly a diamond sparkles
- how much light it throws across a room
- how “alive” it looks when you move your hand
- and, interestingly, how big it appears on the finger
The amazing thing about lab grown diamonds is that, because they’re created under controlled conditions, cutters often get stones with fewer imperfections to start with. That gives them more freedom to be meticulous with the shape and proportions. In simple terms: beautifully cut lab diamonds tend to punch well above their weight.
If you want a deeper breakdown of the technical differences between diamond shapes and styles, there’s a pretty handy resource on lab grown diamonds cuts that I stumbled across recently. But if you’re just after a clear explanation without going too nerdy, keep reading — this one’s for you.
The Most Popular Lab Grown Diamond Cuts — And What They Say About You
Well, not “what they say about you” in the horoscope sense, but cuts genuinely match different personalities, different lifestyles, and different aesthetics. I’ve watched people light up when they finally land on the right one — like a puzzle piece clicking into place.
Here’s how I’d describe the main contenders if we were chatting over coffee.
1. The Round Brilliant — For the Classic Sparkle Lover
If diamonds had a greatest hits album, the round brilliant would be track one.
It’s iconic, timeless, and — let’s be real — absolutely dazzling.
Round brilliants are cut with 57 or 58 facets, all positioned to maximise light return. That’s why they sparkle more intensely than almost anything else. They’re the safe choice, but in a good way. The little black dress of diamond cuts.
People who choose round cuts tend to want something elegant and enduring. No fuss, no fashion trends — just pure, undeniable fire.
2. The Oval Cut — For the “Slightly Different, But Still Sophisticated” Crowd
Ovals have become incredibly popular in Australia over the last few years. Maybe it’s because they make your fingers look longer (a bonus nobody complains about) or because they offer a softer, more romantic silhouette than the round.
What I love about the oval is how versatile it is. It carries a lot of sparkle, but it feels just a little more “modern classic” instead of traditionally classic.
If you like understated individuality, the oval might be your match.
3. The Emerald Cut — Quiet Luxury at Its Finest
Emerald cuts are often misunderstood. They don’t glitter the same way round or oval diamonds do. Their sparkle is more like a slow, elegant shimmer — almost like light sliding across a sheet of ice.
This cut has a long, rectangular step-cut design that shows off clarity more than brilliance. It gives such a “clean lines, glassy finish, luxe minimalism” vibe that I can’t help but associate it with someone who appreciates design, architecture, or a touch of old-school Hollywood glamour.
Emerald cuts also photograph beautifully. (If you’re thinking of proposal photos… just saying.)
4. The Radiant Cut — The Love Child of Sparkle and Shape
A radiant cut is what happens when you put an emerald cut and a round brilliant in a blender. You get the rectangular silhouette of an emerald, but with a whole lot more sparkle.
This cut doesn’t get as much hype as it deserves. Every time I see one in person, I’m reminded just how stunning they are — bold, bright, and unique without being loud.
5. The Princess Cut — Sharp, Square, and Very Modern
Princess cuts are the second most popular diamond shape in the world. They’re edgy (literally — those corners are sharp), geometric, and have this youthful, crisp sparkle that feels almost electric.
I’ve noticed people who choose princess cuts often want something clean and contemporary. Something that stands out without leaning into unusual shapes.
One small tip: if you’re someone who’s a bit clumsy with jewellery (no judgement — it happens), make sure your setting protects the corners. They’re more delicate than you think.
6. The Pear Cut — Romantic, Unique, and a Little Bold
The pear shape — sometimes called the teardrop — is one of the most personality-filled cuts out there. It’s elegant but quirky, refined but daring.
I’ve always thought pear-cut diamonds look best on someone who likes pieces that feel expressive. And when they catch the light? Stunning.
A tiny piece of advice I got from a jeweller once: point the tip toward your fingertip for the most flattering look.
7. The Cushion Cut — Soft, Vintage, and Comfortingly Beautiful
There’s something comforting about a cushion cut. With its rounded corners and soft edges, it has this cosy, almost nostalgic vibe — like something passed down through generations, even if it’s brand new.
Cushion cuts don’t sparkle in a sharp, intense way; instead, they glow. It’s like candlelight instead of strobe lights.
If you love antique styles or romantic period dramas, you’ll probably fall for this one.
Why Lab Made Diamonds and Cut Quality Go Hand in Hand
Something I didn’t fully understand until a gem specialist explained it to me is that lab diamonds aren’t just more sustainable and affordable — they often start off structurally better. Because they grow in controlled environments, they’re less likely to have the deep internal imperfections that make cutting tricky.
And here’s the cool part: when cutters have cleaner starting material, they can take more creative liberties. They can optimise the angles, the depth, the symmetry — all the things that make a cut come alive.
That’s why so many jewellers are excited about the future of lab created stones. They aren’t just an ethical choice; they’re often a quality choice too.
If you’re curious about how lab diamonds fit into gift buying or jewellery trends more broadly, this article on lab made diamonds gives a surprisingly thoughtful perspective.
How to Choose the Right Cut (Without Getting Overwhelmed)
Let’s be real — the endless choices can make your brain melt. I’ve been there. But after talking to jewellers, gemologists, and plenty of newly engaged couples, I’ve noticed there are four questions that simplify things dramatically.
1. What style feels most you?
Classic? Modern? Vintage? Minimalist? Glam?
Even if you’re indecisive, you usually lean one direction.
2. How much sparkle do you actually want?
Some people adore intense brilliance. Others prefer subtle shimmer.
There’s no right answer — just preference.
3. What shape flatters your hand?
Try rings on. Trust me — the cut you love in photos might surprise you in person. (In a good way, usually.)
4. What setting will protect the stone?
Some cuts need more structural support than others.
If you’re wearing your ring daily — gym, work, cooking, everything — the setting matters almost as much as the cut.
The Future of Lab Grown Diamond Cuts: Something Exciting Is Happening
One trend that’s quietly emerging — and honestly, I didn’t expect it — is the rise of fancy, unconventional cuts made specifically for lab diamonds. Because cutters have more flexibility with lab-grown stones, they’re experimenting with shapes you don’t often see in natural diamonds: elongated hexagons, shield cuts, kite cuts, even these sort of modern-art asymmetric designs that look straight off a runway.
It feels like a new era in jewellery design, where creativity isn’t restricted by tradition or material scarcity. And if you’re someone who loves jewellery with a bit of personality, the next few years are going to be very fun.
Why It’s Worth Taking Your Time When Choosing a Cut
There’s one thing I always tell anyone shopping for a diamond: slow down. Let yourself fall in love with the cut, not the idea of the cut.
A diamond, natural or lab grown, is a little piece of art you wear every day. It should feel like something you can look at in 20 years and still smile about. (I know that sounds sentimental, but it’s true.)
When you choose the right cut:
- the sparkle feels personal
- the shape feels like an extension of your style
- and the ring becomes more than jewellery — it becomes a memory
Cheap sentiment? Maybe. But ask anyone who’s worn the wrong ring. Or the right one.
A Final Thought: Your Perfect Cut Is the One That Makes You Hesitate for a Second
You know that moment when you try something on — clothes, shoes, a ring — and you pause because it just hits differently?
That’s the moment you’re chasing.
Don’t rush, don’t overanalyse, don’t feel pressured by trends. Whether you’re choosing a diamond for yourself or for someone else, trust that small emotional pull. It’s there for a reason.
Lab grown diamonds cuts offer so many beautiful possibilities, and you’ll know the right one when it stops you mid-sentence or makes you tilt your hand just to watch the light dance.