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Round Diamond Trilogy Engagement Rings

Drawing together timeless design with modern artistry, our collection of 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 round diamond engagement rings, so explore our full selection of design styles below.

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Taylor & Hart Tranquility Round Engagement Ring 360 detail 01

Tranquility

Round center and side diamond trilogy engagement ring set in 18K rose gold

from $1,820
Taylor & Hart Faith Round Engagement Ring 360 detail 01

Faith

Trilogy engagement ring with round center diamond and pink sapphire sides

from $1,330
Taylor & Hart Faith Round Engagement Ring 360 detail 01

Faith

Trilogy engagement ring with round center diamond and green sapphire sides

from $1,330
Taylor & Hart Faith Round Engagement Ring 360 detail 01

Faith

Trilogy engagement ring with round center diamond and yellow sapphire sides

from $1,470
Taylor & Hart Faith Round Engagement Ring 360 detail 01

Faith

Trilogy engagement ring with round center diamond and purple sapphire sides

from $1,330
Taylor & Hart Affinity Round Engagement Ring 360 detail 01

Affinity

Round diamond center and pear side blue sapphires engagement ring set in 18K white gold

from $1,855
Taylor & Hart Thia Round Engagement Ring 360 detail 01

Thia

Round center engagement ring with marquise green sapphires set in 18K rose gold

from $1,600
Taylor & Hart Venus Round Engagement Ring 360 detail 01

Venus

Round diamond trilogy with round prongs engagement ring set in 18K rose gold

from $2,310
Taylor & Hart Thia Round Engagement Ring 360 detail 01

Thia

Round center engagement ring with marquise purple sapphires set in 18K white gold

from $1,475
Taylor & Hart Thia Round Engagement Ring 360 detail 01

Thia

Round center engagement ring with marquise diamonds set in 18K rose gold

from $1,600
Taylor & Hart Thia Round Engagement Ring 360 detail 01

Thia

Round center engagement ring with marquise purple sapphires set in platinum

from $1,550
Taylor & Hart Divinity Round Engagement Ring 360 detail 01

Divinity

Round diamond center and prong-set diamonds engagement ring set in 18K rose gold

from $1,120
Taylor & Hart Lantana Round Engagement Ring 360 detail 01

Lantana

Round engagement ring framed by marquise diamond clusters engagement ring set in 18K rose gold

from $1,505
Taylor & Hart Faith Round Engagement Ring 360 detail 01

Faith

Trilogy engagement ring with round center diamond and yellow sapphire sides

from $1,330
Taylor & Hart Faith Round Engagement Ring 360 detail 01

Faith

Trilogy engagement ring with round center diamond and pink sapphire sides

from $1,365
Taylor & Hart Thimble Round Engagement Ring 360 detail 01

Thimble

Round diamond trilogy with filigree basket engagement ring set in 18K rose gold

from $1,330
Taylor & Hart Lierre Round Engagement Ring 360 detail 01

Lierre

Round organic ruby detail engagement ring in 18K rose gold

from $1,450
Taylor & Hart Utopia Round Engagement Ring 360 detail 01

Utopia

Round diamond center and tapered baguettes engagement ring set in 18K white gold

from $2,415
Taylor & Hart Mirror Round Engagement Ring 360 detail 01

Mirror

Round diamond art deco trilogy engagement ring with tapered baguettes

from $1,505
Taylor & Hart Faith Round Engagement Ring 360 detail 01

Faith

Trilogy engagement ring with round center diamond and pink sapphire sides

from $1,330
Taylor & Hart Affinity Round Engagement Ring 360 detail 01

Affinity

Round diamond center and pear side diamonds engagement ring set in 18K rose gold

from $1,715
Taylor & Hart Thia Round Engagement Ring 360 detail 01

Thia

Round center engagement ring with marquise pink sapphires set in 18K yellow gold

from $1,400
Taylor & Hart Utopia Round Engagement Ring 360 detail 01

Utopia

Round diamond center and tapered baguettes engagement ring set in 18K rose gold

from $2,345
Taylor & Hart Mirror Round Engagement Ring 360 detail 01

Mirror

Round diamond art deco trilogy engagement ring with tapered baguettes

from $1,435
Taylor & Hart Faith Round Engagement Ring 360 detail 01

Faith

Trilogy engagement ring with round center diamond and yellow sapphire sides

from $1,365
Taylor & Hart Faith Round Engagement Ring 360 detail 01

Faith

Trilogy engagement ring with round center diamond and yellow sapphire sides

from $1,330
Taylor & Hart Thia Round Engagement Ring 360 detail 01

Thia

Round center engagement ring with marquise pink sapphires set in platinum

from $1,550
Taylor & Hart Thia Round Engagement Ring 360 detail 01

Thia

Round center engagement ring with marquise pink sapphires set in 18K white gold

from $1,475
Taylor & Hart Thia Round Engagement Ring 360 detail 01

Thia

Round center engagement ring with marquise pink sapphires set in 18K rose gold

from $1,400
Taylor & Hart Affinity Round Engagement Ring 360 detail 01

Affinity

Round diamond center and pear side blue sapphires engagement ring set in 18K rose gold

from $1,715
Taylor & Hart Tranquility Round Engagement Ring 360 detail 01

Tranquility

Round center diamond and round side blue sapphire trilogy engagement ring set in 18K white gold

from $1,925
Taylor & Hart Tranquility Round Engagement Ring 360 detail 01

Tranquility

Round center diamond and round side blue sapphire trilogy engagement ring set in 18K rose gold

from $1,820
Taylor & Hart Tranquility Round Engagement Ring 360 detail 01

Tranquility

Round center diamond and round side ruby trilogy engagement ring set in 18K white gold

from $1,925
Taylor & Hart Tranquility Round Engagement Ring 360 detail 01

Tranquility

Round center diamond and round side ruby trilogy engagement ring set in 18K rose gold

from $1,820
Taylor & Hart Thia Round Engagement Ring 360 detail 01

Thia

Round center engagement ring with marquise diamonds set in 18K rose gold

from $1,400
Taylor & Hart Thia Round Engagement Ring 360 detail 01

Thia

Round center engagement ring with marquise purple sapphires set in 18K yellow gold

from $1,400

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’.

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 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 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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