Skip to content

Ordering for Christmas? Order or approve your design by Tuesday 1 December. Book a private viewing

Cart

Your cart is empty

Lab-Grown Round Brilliant

Every lab-grown ring shows today’s five diamonds that meet Simon’s standard, most in 360°. You choose your exact stone before you buy. See today’s 1 carat and 2 carat prices.

Sort by

23 products

'Sasha' Round Brilliant Cut Lab Grown Engagement Ring
'Sasha' Round Brilliant Cut Lab Grown Engagement Ring PriceFrom $2,350

in 9ct gold · 1.00ct

'Nadia' Round Brilliant Cut Lab Grown Engagement Ring
'Nadia' Round Brilliant Cut Lab Grown Engagement Ring PriceFrom $2,350

in 9ct gold · 1.00ct

Grace Round Brilliant Cut Lab Grown Engagement Ring
'Grace' Round Brilliant Cut Lab Grown Engagement Ring PriceFrom $1,850

in 9ct gold · 1.00ct

June Round Brilliant Cut Lab Grown Engagement Ring
'June' Round Brilliant Cut Lab Grown Engagement Ring PriceFrom $1,850

in 9ct gold · 1.00ct

Nothing quite right?

Every design here can be changed for you.

Stone, metal, band, setting — designed with you in our King William Street boutique and made to order in four to six weeks.

Book a private viewing
Chloe Round Brilliant Cut Lab Grown Engagement Ring
'Chloe' Round Brilliant Cut Lab Grown Engagement Ring PriceFrom $2,350

in 9ct gold · 1.00ct

Casey Round Brilliant Cut Lab Grown Engagement Ring
'Casey' Round Brilliant Cut Lab Grown Engagement Ring PriceFrom $1,850

in 9ct gold · 1.00ct

Kris Round Brilliant Cut Lab Grown Engagement Ring
'Kris' Round Brilliant Cut Lab Grown Engagement Ring PriceFrom $1,850

in 9ct gold · 1.00ct

Fiona Round Brilliant Cut Lab Grown Engagement Ring
'Fiona' Round Brilliant Cut Lab Grown Engagement Ring PriceFrom $1,850

in 9ct gold · 1.00ct

Katie Round Brilliant Cut Lab Grown Engagement Ring
'Katie' Round Brilliant Cut Lab Grown Engagement Ring PriceFrom $1,850

in 9ct gold · 1.00ct

Abbie Round Brilliant Cut Lab Grown Engagement Ring
'Abbie' Round Brilliant Cut Lab Grown Engagement Ring PriceFrom $1,850

in 9ct gold · 1.00ct

Delta Round Brilliant Cut Lab Grown Engagement Ring
'Delta' Round Brilliant Cut Lab Grown Engagement Ring PriceFrom $1,850

in 9ct gold · 1.00ct

Hope Round Brilliant Cut Lab Grown Engagement Ring
'Hope' Round Brilliant Cut Lab Grown Engagement Ring PriceFrom $2,350

in 9ct gold · 1.00ct

Julia Round Brilliant Cut Lab Grown Engagement Ring
'Julia' Round Brilliant Cut Lab Grown Engagement Ring PriceFrom $2,350

in 9ct gold · 1.00ct

Kylie Round Brilliant Cut Lab Grown Engagement Ring
'Kylie' Round Brilliant Cut Lab Grown Engagement Ring PriceFrom $2,350

in 9ct gold · 1.00ct

Elise Round Brilliant Cut Lab Grown Engagement Ring
'Elise' Round Brilliant Cut Lab Grown Engagement Ring PriceFrom $2,350

in 9ct gold · 1.00ct

Adele Round Brilliant Cut Lab Grown Engagement Ring
'Adele' Round Brilliant Cut Lab Grown Engagement Ring PriceFrom $2,350

in 9ct gold · 1.00ct

Emily Round Brilliant Cut Lab Grown Engagement Ring
'Emily' Round Brilliant Cut Lab Grown Engagement Ring PriceFrom $2,350

in 9ct gold · 1.00ct

Faith Round Brilliant Cut Lab Grown Engagement Ring
'Faith' Round Brilliant Cut Lab Grown Engagement Ring PriceFrom $2,700

in 9ct gold · 1.00ct

Flora Round Brilliant Cut Lab Grown Engagement Ring
'Flora' Round Brilliant Cut Lab Grown Engagement Ring PriceFrom $2,700

in 9ct gold · 1.00ct

Jenna Round Brilliant Cut Lab Grown Engagement Ring
'Jenna' Round Brilliant Cut Lab Grown Engagement Ring PriceFrom $2,700

in 9ct gold · 1.00ct

April Round Brilliant Cut Lab Grown Engagement Ring
'April' Round Brilliant Cut Lab Grown Engagement Ring PriceFrom $2,700

in 9ct gold · 1.00ct

Eva Round Brilliant Cut Lab Grown Engagement Ring
'Eva' Round Brilliant Cut Lab Grown Engagement Ring PriceFrom $2,700

in 9ct gold · 1.00ct

Anna Round Brilliant Cut Lab Grown Engagement Ring
'Anna' Round Brilliant Cut Lab Grown Engagement Ring PriceFrom $2,700

in 9ct gold · 1.00ct

Made to order

Yours doesn’t have to be on this page.

Stone, metal, band, setting — designed with you in our King William Street boutique and made to order in four to six weeks.

Book a private viewing

Round brilliant lab-grown engagement rings in Adelaide

The round brilliant is the cut every engagement setting was first drawn for, and still the one that returns the most light. Its 57 or 58 facets are arranged to bounce light back up through the top of the stone, which is why a well-cut round looks bright from every angle and in every room.

Every round ring on this page is a Simon Alexander design, made to order around an IGI-certified lab-grown diamond that you choose. The designs are Sasha, Nadia, Grace, June, Chloe, Casey, Kris, Fiona, Katie, Abbie, Delta, Hope, Julia, Kylie, Elise, Adele, Emily, Faith, Flora, Jenna, April, Eva and Anna.

The range runs from plain solitaires such as Casey, Abbie, Grace, Katie and Fiona to accent-diamond and halo designs such as Hope, Julia, Kylie, Emily and Chloe. Any design can be adjusted, and if the right ring is not here we will design it with you.

Choosing a round diamond

For a round, cut is the grade that matters most. Simon’s five only include stones with an excellent cut grade, alongside D to G colour, VS2 to VVS1 clarity and no fluorescence, all IGI certified. A 1 carat round measures about 6.5mm across; a 2 carat about 8.1mm.

How it wears

A round suits every setting style, from a plain four-claw solitaire to a halo or a band set with diamonds, and it sits evenly beside almost any wedding band.

What it costs

Every price on this page is the finished ring: setting, metal and the lab-grown diamond. See today’s 1 carat prices and today’s 2 carat prices by shape, or compare lab-grown and natural. Natural round diamonds come with a GIA certificate; ask us for a shortlist.

Made to order in Adelaide

Each ring is designed in our King William Street boutique, Australian made, and set and hand-finished by our own jewellers. Most take four to six weeks. Come and see the shapes side by side at Level 1, 14 King William Street.