Where do our diamonds come from?

Designs in the collection are available in the following diamond and gemstone shapes: round brilliant, cushion, oval, emerald, pear, princess or square, marquise, Asscher, radiant, heart, hexagonal and even antique cuts like rose cut, old mine cut and Old European cut diamonds. We offer both naturally mined diamonds and lab grown diamonds. All of our engagement ring centre diamonds are GIA or IGI graded and certified. While all other diamonds featured in our products aren’t always certified, simply ask your Design Consultant and we can do our best to source you options with certification. In regards to natural diamonds, we source diamonds globally from diamond manufacturers that comply with the United Nations Kimberley Process in order to affirm all of our diamonds are ethically sourced. To learn more about the different sources of diamonds, from lab-grown diamonds to CanadaMark, visit our guide to diamonds .

How do you figure out you or your partner's ring size?

You’ve decided to pop the question and take the first step to spending the rest of your life together, but what ring size is my partner?! We have some invaluable advice for choosing that perfect ring available on our ring size guide – even if you’re planning a surprise proposal.

Do we get inspired by celebrity engagement rings?

Engagement rings are so special because they’re more than just a jewellery purchase. They’re a tangible mark of the intention to get married, while a wedding ring symbolises the union. We understand how sentimentally valuable an engagement is and we love that this symbol of commitment can be so personal to each couple. As designers, we’ve always looked to the high-profile jewellery of celebrities, royals, and cultural icons to kickstart our creativity. And lots of our customers feel the same! Browse through our collection of celebrity engagement ring guides to how you can incorporate some new ideas into a design that suits your price point. Additionally, we’ve collected some of the most popular bespoke designs from our Instagram page into one place so that you can get the design ideas flowing. Browse our ‘As Seen on Instagram’ page here .

18k Yellow Gold Round Diamond Trilogy Engagement Rings

Drawing together timeless design with modern artistry, our collection of yellow gold round diamond trilogy engagement rings offers you an exciting selection of unique rings, allowing you to find a design that speaks to love you share with your partner. A trilogy engagement ring is a timeless symbol of the journey you and your partner have shared as the three gemstones of this ring style represent the past, present, and future. Best known for their brightness and brilliance, a round diamond is a time-honoured diamond shape for an engagement ring as its versatile circular shape suits all styles and metals. Our designers draw creative inspiration from all over to bring you a diverse range of yellow gold round diamond engagement rings, so explore our full selection of design styles below.

39 rings found

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Marula

Round centre framed by round diamond clusters engagement ring set in 18ct yellow gold

from NZ$2,925

Marula

Round centre framed by round pink sapphire and diamond clusters engagement ring set in 18ct yellow gold

from NZ$2,925

Faith

Trilogy engagement ring with round centre diamond and pear diamond sides

from NZ$2,275

Tamora

Round centre engagement ring with marquise diamond petals on a knife edge band

from NZ$2,625

Tamora

Round centre engagement ring with marquise green sapphire petals on a knife edge band

from NZ$2,625

Faith

Trilogy engagement ring with round centre diamond and green sapphire sides

from NZ$2,275

Faith

Trilogy engagement ring with round centre diamond and blue sapphire sides

from NZ$2,275

Lierre

Round organic green sapphire and diamond detail engagement ring in 18ct yellow gold

from NZ$2,475

Faith

Trilogy engagement ring with round centre diamond and teal sapphire sides

from NZ$2,275

Affinity

Round diamond centre and pear side diamonds engagement ring set in 18ct yellow gold

from NZ$2,925

Thia

Round centre engagement ring with marquise diamonds set in 18ct yellow gold

from NZ$2,375

Venus

Round diamond trilogy with bead claws engagement ring set in 18ct yellow gold

from NZ$3,950

Affinity

Round diamond centre and pear side blue sapphires engagement ring set in 18ct yellow gold

from NZ$2,925

Tranquility

Round centre and side diamond trilogy engagement ring set in 18ct yellow gold

from NZ$3,095

Faith

Trilogy engagement ring with round centre diamond and peach sapphire sides

from NZ$2,275

Tamora

Round centre engagement ring with marquise purple sapphire petals on a knife edge band

from NZ$2,625

Thimble

Round diamond trilogy with filigree basket engagement ring set in 18ct yellow gold

from NZ$2,275

Marula

Round centre framed by round blue sapphire and diamond clusters engagement ring set in 18ct yellow gold

from NZ$2,925

Mirror

Round diamond art deco trilogy engagement ring with tapered baguettes

from NZ$2,450

Tamora

Round centre engagement ring with marquise dark blue sapphire petals on a knife edge band

from NZ$2,625

Thia

Round centre engagement ring with marquise green sapphires set in 18ct yellow gold

from NZ$2,375

Lantana

Round engagement ring framed by marquise diamond clusters engagement ring set in 18ct yellow gold

from NZ$2,575

Thia

Round centre engagement ring with marquise green sapphires set on a diamond pavé 18ct yellow gold band

from NZ$2,725

Divinity

Round diamond centre and claw-set diamonds engagement ring set in 18ct yellow gold

from NZ$1,895

Lierre

Round organic diamond detail engagement ring in 18ct yellow gold

from NZ$2,475

Lierre

Round organic sapphire and diamond detail engagement ring in 18ct yellow gold

from NZ$2,475

Thia

Round centre engagement ring with marquise diamonds set on a diamond pavé 18ct yellow gold band

from NZ$2,725

Thia

Round centre engagement ring with marquise rubys set in 18ct yellow gold

from NZ$2,375

Thia

Round centre engagement ring with marquise rubys set on a diamond pavé 18ct yellow gold band

from NZ$2,725

Lierre

Round organic ruby detail engagement ring in 18ct yellow gold

from NZ$2,475

Tranquility

Round centre diamond and round side ruby trilogy engagement ring set in 18ct yellow gold

from NZ$3,095

Utopia

Round diamond centre and tapered baguettes engagement ring set in 18ct yellow gold

from NZ$3,995

Tranquility

Round centre diamond and round side blue sapphire trilogy engagement ring set in 18ct yellow gold

from NZ$3,095

Faith

Trilogy engagement ring with round centre diamond and pink sapphire sides

from NZ$2,275

Faith

Trilogy engagement ring with round centre diamond and purple sapphire sides

from NZ$2,275

Faith

Trilogy engagement ring with round centre diamond and yellow sapphire sides

from NZ$2,275

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18k Yellow Gold Round Diamond Trilogy Engagement Rings

We want the process of finding a ring to be a creative act, one that gets to the heart of what makes your love unique. Our collection of engagement rings features a diverse range of styles, metals, and ring shapes, making it easy for you to feel confident that you’ve found ‘the one’.

Our collection of trilogy engagement rings come to life when set in rich 18k yellow gold, as the warm glow of this precious metal accentuates the internal fire of any centre diamond. Having long been a traditional choice for wedding jewellery, yellow gold engagement rings have experienced a surge of popularity in the last five years—making an 18k yellow gold engagement ring the perfect way to bring the past and present together in your design.

Sometimes referred to as a trinity engagement ring or three stone engagement ring, a trilogy engagement rings feature three gemstones or diamonds, each one representing the past, present, and future. It’s their symbolic nature that makes hearts fall for a yellow gold trilogy engagement. With three centre stones, a trilogy engagement ring has a bold presence, filled with all the light of your love.

Who could deny the wow-factor of a brilliant round diamond? Our most popular diamond type by far, round diamond engagement rings are versatile, classic, and can fill and entire room with shimmer light. When set in a trilogy engagement ring, round diamonds come alive as they’ve been mathematically developed to reflect the most light. If you want a 18k yellow gold round diamond trilogy engagement ring that stands out from the rest, consider adding some custom details such as an engraving or double prong setting to your design.

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18k Yellow Gold Round Diamond Trilogy Engagement Rings

Marula

Marula

Faith

Tamora

Tamora

Faith

Faith

Lierre

Faith

Affinity

Thia

Venus

Affinity

Tranquility

Faith

Tamora

Thimble

Marula

Mirror

Tamora

Thia

Lantana

Thia

Divinity

Lierre

Lierre

Thia

Thia

Thia

Lierre

Tranquility

Utopia

Tranquility

Faith

Faith

Faith

18k Yellow Gold Round Diamond Trilogy Engagement Rings

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