If you’d told me ten years ago that I’d be selling diamonds grown in a lab — not mined from deep within the earth — I probably would’ve raised an eyebrow. As a jeweller, I grew up with the romance of natural diamonds: the centuries-old allure, the “forever” promise, the sparkle that seemed almost untouchable. But, well, times change.
These days, I’m seeing more couples walk into my studio asking specifically for lab grown diamond shapes — not just as a budget-friendly alternative, but as a conscious, ethical choice. And honestly, I get it. The technology behind these stones has come so far that, even with a loupe, most experts can’t tell the difference. The magic is still there — it’s just made a little differently.
Let’s talk about what makes these lab grown diamonds so intriguing, especially when it comes to their shapes. Because, as I’ve learned over years of setting, cutting, and polishing stones, the shape of a diamond doesn’t just define how it looks — it defines how it feels.
What Exactly Are Lab Grown Diamonds?
Before diving into the shapes themselves, it’s worth clearing up a common misconception. Lab grown diamonds aren’t “fake.” They’re chemically, physically, and optically identical to mined ones. The only difference? They’re created in a controlled environment — think of it like growing a crystal garden, just far more advanced.
These diamonds are made using either HPHT (High Pressure High Temperature) or CVD (Chemical Vapour Deposition) methods, both of which mimic the natural conditions deep within the Earth. The result is a genuine diamond, with the same sparkle, the same durability, and often, a more transparent story.
You might not know this, but even some of the world’s top jewellers have started incorporating lab created diamonds into their collections. They’re not just for eco-conscious shoppers — they’re for anyone who appreciates beauty without compromise.
(If you’re curious about the broader benefits, there’s a great piece on lab created diamonds that explains how they’ve become the modern symbol of love and sustainability.)
Why Shape Matters More Than You Think
When customers come in, they often say, “I just want a round diamond.” It’s classic, sure. But once they start trying on different shapes — oval, emerald, pear — something changes. Their eyes light up when they find the one that feels right.
Shape, after all, isn’t just aesthetics. It’s personality. It’s storytelling. It’s how a diamond catches light and how it reflects the wearer’s own character.
Let’s walk through some of the most popular lab grown diamond shapes, and what they might say about the person wearing them.
1. Round Brilliant: The Timeless Star
The round brilliant is, hands down, the most popular diamond shape — and it’s not hard to see why. With 58 precisely cut facets, it maximises light reflection, giving you that iconic, fiery sparkle.
As a jeweller, I can say this shape is the ultimate crowd-pleaser. It suits almost any setting and never goes out of style. It’s for the person who loves tradition but appreciates perfection — someone who believes that classic doesn’t mean ordinary.
And interestingly, lab grown round diamonds often come at a fraction of the price of mined ones, meaning you can go bigger or higher in quality without blowing your budget. That’s a win in my book.
2. Oval: Elegant with a Twist
Oval diamonds have this lovely way of elongating the finger. They’re graceful but a touch unconventional — like someone who wears linen in summer but pulls it off effortlessly.
What I love about ovals is how they blend brilliance with character. You get nearly the same sparkle as a round cut, but with a softer, more organic silhouette. In recent years, I’ve seen a lot of brides opting for ovals as they balance sophistication and individuality.
And here’s a tip: if you’re choosing an oval lab grown diamond, look for one with minimal “bow-tie effect” — that shadow across the middle. A well-cut stone will shine evenly from every angle.
3. Emerald Cut: Understated Luxury
The emerald cut doesn’t scream for attention — it whispers confidence. Its long, clean lines and “hall of mirrors” effect are mesmerising. But it’s not about sparkle in the traditional sense. Instead, it reflects light in broad flashes, like sunlight dancing on water.
People who choose emerald cuts tend to appreciate structure, design, and quiet elegance. They don’t need a diamond that shouts — they want one that speaks in subtleties.
Lab grown emerald cuts have become incredibly popular among minimalist brides and those who appreciate architecture or vintage aesthetics. There’s something timeless and bold about their symmetry.
4. Princess Cut: Sharp, Modern, Fearless
I’ve always thought the princess cut feels like a statement piece — modern, youthful, a little bit fierce. With its square shape and sharp corners, it reflects a ton of light, making it one of the most brilliant cuts available.
This shape suits someone who knows what they want. It’s confident, unapologetic, and bold. And because lab grown diamond shapes can be cut with the same precision as mined ones, the princess cut remains just as dazzling.
One small insider tip: make sure the setting protects those corners. They’re stunning but can be delicate if not well-secured.
5. Pear Shape: A Touch of Romance
The pear, or teardrop, shape combines the best of both worlds — part round, part marquise. It’s elegant, a little whimsical, and surprisingly flattering on the hand.
Many clients tell me it feels “different” — and that’s exactly why they love it. It’s often chosen by those with creative or sentimental personalities. Plus, it has this gorgeous way of elongating the fingers, especially when worn with the point facing outward.
Fun fact: some of the world’s most famous celebrity engagement rings have featured pear-shaped diamonds — though these days, more couples are choosing lab grown pear shapes for a sustainable twist on old-school glamour.
6. Cushion Cut: Old-School Glamour with a Soft Edge
If the round cut is timeless, the cushion cut is nostalgic. Its rounded corners and pillow-like shape evoke a sense of vintage charm — the kind you’d see in antique rings from the 1920s.
But don’t be fooled by its softness. A well-cut cushion diamond can sparkle like a firework. It’s ideal for someone who loves romance, history, and a hint of old-world glamour.
Personally, I love setting lab grown cushion cuts in rose gold. The warmth of the metal complements the depth of the facets beautifully.
7. Marquise: Dramatic and Distinctive
There’s something inherently dramatic about the marquise cut. Its elongated body and pointed ends create an illusion of size — making it appear larger than other diamonds of the same carat weight.
It’s a shape for someone who loves to stand out, who enjoys a bit of flair and individuality. The marquise was originally designed for French royalty — no wonder it feels regal.
And the best part? Lab grown marquise diamonds can be crafted with remarkable symmetry, which is key to their balance and brilliance.
8. Radiant Cut: Best of Both Worlds
The radiant cut is like a hybrid between the round and the emerald — geometric yet dazzling. It combines the clean edges of an emerald with the sparkle of a brilliant cut.
People who gravitate toward this shape often like balance — a bit of order, a bit of fire. And I’ve noticed that in lab grown diamonds, the precision of radiant cuts is even more consistent thanks to computer-assisted cutting technology.
Choosing Your Shape: Head vs. Heart
Here’s the truth: no chart or guide can tell you which diamond shape is yours. You’ll know when you see it — when it catches the light just right and something inside you goes, “That’s the one.”
But if you want a little help understanding proportions, cuts, and light performance, this guide to lab grown diamond shapes is worth checking out. It breaks down the science behind the sparkle in a really approachable way.
Why Lab Grown Diamonds Are Changing the Game
Beyond shapes, what really draws people to lab grown diamonds is the shift in mindset. Today’s buyers care about sustainability, traceability, and value. They want to know their diamond didn’t come at a human or environmental cost.
And it’s not just about being eco-friendly — it’s about transparency. With lab created diamonds, you know exactly where and how your stone was made. No mystery mines, no questionable sourcing. Just craftsmanship, technology, and beauty.
In Australia especially, I’ve noticed a cultural shift. Younger generations are more open-minded — they see lab grown not as “less than,” but as the future of fine jewellery. And honestly, that’s exciting.
The Future of Sparkle
As a jeweller, I used to think my job was to sell diamonds. Now, I see it differently. My job is to tell stories — to help people find a piece that reflects who they are, whether it’s mined or grown.
Lab grown diamonds have given us new creative freedom. We can explore shapes, colours, and settings that used to be out of reach. We can design boldly, responsibly, beautifully.
And maybe, just maybe, that’s what makes these stones truly special. They’re not just symbols of love — they’re symbols of progress.
So, whether you’re drawn to a fiery round, a romantic pear, or a minimalist emerald, remember this: the shape you choose isn’t just about what shines on your hand. It’s about what speaks to your heart.
