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 .

Platinum Marquise Diamond Engagement Rings

Drawing together timeless design with modern artistry, our collection of platinum marquise diamond 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. Certain styles determine the overall silhouette and impact of your engagement ring, so take time to consider if a solitaire, pavé, halo, or trilogy design is the one for you. The stunning marquise cut diamond dates back to 18th century France and its elongated elliptical shape is both eye-catching and imbued with romance. Our designers draw creative inspiration from all over to bring you a diverse range of platinum marquise diamond engagement rings, so explore our full selection of design styles below.

26 rings found

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Tamora

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

from US$1,715

Tamora

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

from US$1,715

Affinity

Marquise diamond centre and pear side blue sapphires engagement ring set in platinum

from US$1,960

Tamora

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

from US$1,715

Affinity

Marquise diamond centre and pear side diamonds engagement ring set in platinum

from US$1,960

Faith

Trilogy engagement ring with marquise centre diamond and pear diamond sides

from US$1,470

Dulcet

Marquise diamond centre and fishtail pavé diamond band engagement ring set in platinum

from US$1,365

Thyme

Marquise solitaire engagement ring with hidden diamond halo and pavé band

from US$1,925

Lantana

Marquise engagement ring framed by marquise diamond clusters engagement ring set in platinum

from US$1,695

Demure

Marquise diamond solitaire engagement ring set in platinum

from US$945

Mirror

Marquise diamond art deco trilogy engagement ring with tapered baguettes

from US$1,575

Faith

Trilogy engagement ring with marquise centre diamond and blue sapphire sides

from US$1,470

Tamora

Marquise centre engagement ring with marquise teal sapphire petals on a knife edge band

from US$1,715

Nutmeg

Marquise solitaire engagement ring in east-west setting with hidden halo and half eternity band

from US$1,960

Taylor & Hart Joy Marquise Engagement Ring 360 detail 01

Joy

Marquise diamond four-claw solitaire engagement ring set in platinum

from US$1,190

Allure

Marquise diamond centre and pavé diamond halo engagement ring set in platinum

from US$2,065

Damson

Marquise solitaire engagement ring with blue sapphire and diamond ombré pavé

from US$1,365

Hope

Marquise diamond six-claw solitaire engagement ring set in platinum

from US$1,015

Grace

Marquise diamond solitaire engagement ring set in platinum

from US$1,120

Lissome

Marquise diamond center and pavé diamond band engagement ring set in platinum

from US$1,225

Sirius

Marquise diamond solitaire with engagement ring set in platinum

from US$1,680

Dove

Marquise solitaire with pavé diamond halo engagement ring set in platinum

from US$1,540

Purity

Marquise diamond solitaire bezel engagement ring set in platinum

from US$1,260

Selene

Marquise engagement ring with vintage-inspired bezel set diamonds along the band

from US$1,820

Sonder

Marquise diamond centre and bead-set diamonds engagement ring set in platinum

from US$2,065

Flourish

Marquise diamond centre and bezel set diamond band engagement ring set in platinum

from US$1,995

Platinum Marquise Diamond 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’.

When it comes to engagement rings, platinum has always been the most popular choice—accounting for over 60% of the rings we make today. Durable, naturally bright, and low maintenance, this precious metal makes platinum engagement rings last a lifetime. A platinum band with a unique ring is a match made in heaven, sure to make any centre diamond look its best for years to come.

Marquise diamonds bring together the best of an elongated diamond shape and the brilliant facet structure of a round diamond. The result is a diamond that flatters on the finger and catches the light in a mesmerising way, especially when set in platinum. Marquise diamond engagement rings are uncommon, but that’s what makes them so beautiful. Like the irreplaceable nature of your love, platinum hexagonal diamond engagement rings have the charm of feeling one of a kind.

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Platinum Marquise Diamond Engagement Rings

Tamora

Tamora

Affinity

Tamora

Affinity

Faith

Dulcet

Thyme

Lantana

Demure

Mirror

Faith

Tamora

Nutmeg

Joy

Allure

Damson

Hope

Grace

Lissome

Sirius

Dove

Purity

Selene

Sonder

Flourish

Platinum Marquise Diamond Engagement Rings

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Filters

Price

Metal

Ring style

Stone shape

Design style

Design features

Platinum Marquise Diamond Engagement Rings

Tamora

Tamora

Affinity

Tamora

Affinity

Faith

Dulcet

Thyme

Lantana

Demure

Mirror

Faith

Tamora

Nutmeg

Joy

Allure

Damson

Hope

Grace

Lissome

Sirius

Dove

Purity

Selene

Sonder

Flourish

Platinum Marquise Diamond Engagement Rings

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