Lab-Grown Diamond Engagement Rings in Australia: 2026 Guide

Q: Are lab-grown diamond engagement rings popular in Australia?

Yes. Lab-grown diamond engagement rings have grown rapidly in popularity across Australia. Australian couples are increasingly choosing lab-grown diamonds for their ethical sourcing, environmental benefits, and the ability to buy a larger, better-quality diamond for the same price as a mined alternative.

Q: How much cheaper are lab-grown diamonds in Australia?

Lab-grown diamonds in Australia typically cost 50 to 80 percent less than equivalent mined diamonds. A 1-carat lab-grown diamond of excellent quality may cost between AUD 800 and AUD 2,000, compared to AUD 5,000 to AUD 15,000 or more for a comparable mined stone.

Q: Do Australian jewellers certify lab-grown diamonds?

Yes. Reputable Australian jewellers supply lab-grown diamonds certified by independent laboratories such as IGI (International Gemological Institute) or GIA (Gemological Institute of America). These certificates confirm the stone's carat, cut, colour, and clarity grades.

Q: Are lab-grown diamond rings a good investment in Australia?

Lab-grown diamonds should be purchased for their beauty and meaning rather than as a financial investment. Like mined diamonds, they are not guaranteed to appreciate in value. However, they allow you to get a significantly larger or better-quality diamond for your budget, which many couples prioritise.

Lab-grown diamond engagement rings have become one of the fastest-growing jewellery categories in Australia. They're carbon, in the crystal structure that makes a diamond hard and bright. They cost less than mined stones, and centre stones of one carat and up come with IGI certification. Here's what to know before you buy.

What is a lab-grown diamond?

A lab-grown diamond is a real diamond, not a simulant. It's grown in a laboratory using High Pressure High Temperature (HPHT) or Chemical Vapour Deposition (CVD) technology, replicating the conditions under which diamonds form in the earth. The result is a stone with the hardness, crystal structure and brilliance of a mined diamond.

How much do they cost in Australia?

Lab-grown diamonds cost considerably less than equivalent mined stones. A 1.5ct oval-cut lab-grown diamond ring in 18K gold typically sits around AUD $4,000 to $7,000, against roughly AUD $15,000 to $25,000 for the mined equivalent. At Una Diamond, all rings are handcrafted to order and priced transparently.

Are they certified?

Any reputable lab-grown diamond in Australia should carry an IGI (International Gemological Institute) certificate, graded on the same four C standards as mined diamonds. At Una Diamond, centre stones of one carat and up ship with an IGI certificate. IGI sets that threshold, not us.

How long does it take?

At Una Diamond, all rings are handcrafted to order with a six-week lead time in solid 18K gold or platinum. Factor this into your proposal planning and order early if you have a specific date in mind.

What styles are available?

From clean solitaire settings to vintage-inspired designs, toi et moi rings and emerald-cut statement pieces, Una Diamond offers the full range. The most popular cuts in Australia right now are oval, emerald and radiant.

Browse the full collection or start designing your own ring.