Victoria, Australia – 26 August, 2026 – Ask a jeweller what’s changed in the last five years and lab-grown diamonds come up almost immediately. They’re not a niche alternative anymore. For a growing number of couples, they’re the default starting point.
Why Lab-Grown Diamonds Are Having a Moment
The chemistry is identical to a mined diamond. Same carbon lattice, same hardness, same fire under light. The difference is where it comes from: a lab reproduces the pressure and heat conditions found deep in the earth, over weeks rather than a billion years. Most buyers can’t tell the two apart without a gemological report, and increasingly, they don’t want to.
Price is part of the appeal. A lab-grown stone typically costs 60 to 80 percent less than a mined equivalent of the same size and clarity. That gap lets couples put money into cut quality or a larger centre stone instead of stretching for carat weight alone.
The Sustainability Case Isn’t Just Marketing
Diamond mining moves an enormous amount of earth for a very small yield. Producing lab-grown stones still uses energy, so it’s not a free pass. But it sidesteps the land disturbance, water use, and supply chain opacity that have dogged parts of the mined diamond trade for decades. Melbourne jeweller Cullen Jewellery has built its sourcing policy around this shift, favouring lab-grown stones as the standard rather than the upsell. For buyers who’ve done even a little reading on where their ring comes from, that’s not a minor detail. It’s often the deciding factor.
Custom Design Is Where the Real Change Shows
Here’s the part that gets less attention: lab-grown diamonds have made bespoke design accessible in a way it wasn’t before. When the stone itself costs less, there’s more room in the budget for a setting that’s actually built around the person wearing it rather than pulled off a shelf. Cullen Jewellery works with couples to design rings from scratch around a chosen lab-grown stone rather than fitting the stone into a stock setting. It’s a small change in process, but it changes the end result considerably. A setting designed for a specific stone, hand, and style sits differently than one adapted to fit.
That kind of customisation used to be reserved for buyers with a much bigger budget. Now it’s a reasonable ask for most people shopping for an engagement ring.
What to Ask Before You Commit
Not every lab-grown stone is graded the same way, so ask for independent certification (IGI or GIA are the two to look for), not just a supplier’s in-house report. Ask how the setting is made, not just designed. Cast settings and hand-fabricated ones wear differently over decades, and a good jeweller will tell you which one you’re getting without being asked twice.
And ask what happens if the ring needs resizing in a year. Bespoke doesn’t mean fixed. A ring that can be adjusted, re-tipped, or reset later is one that’s actually built to last, not just to look good in the first photo.
The stone gets most of the attention in these conversations. The setting is usually where the real decision gets made.
About Cullen Jewellery
Cullen Jewellery is a global premium jewellery brand specialising in lab-grown diamond, lab-grown sapphire, and moissanite engagement rings, wedding bands, and fine jewellery. Founded in Australia in 2018 by Jordan Cullen, the company was built around making the ring-buying process more transparent and accessible, helping customers understand their options with clarity rather than industry jargon. Every piece is designed for longevity and crafted with an emphasis on conscience and care, backed by a lifetime manufacturing warranty. Cullen now serves a global customer base of over 36,000 couples, with showrooms across Australia, New Zealand, and the US, plus personalised virtual appointments worldwide.
Media Contact
Company Name: Cullen Jewellery
Contact Person: Media Relations
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City: Victoria (VIC)
Country: Australia
Website: https://cullenjewellery.com/