Trilogy diamond rings, also known as three stone engagement rings, feature a centre diamond framed by two side diamonds to create a balanced three-stone design. Traditionally, the three diamonds symbolise a relationship’s past, present and future, making trilogy rings particularly meaningful for engagements and anniversaries.
At Polished Diamonds, trilogy rings can be customised using natural or lab-grown diamonds, different diamond-shape combinations and your choice of platinum, white gold, yellow gold or rose gold. Choose three matching shapes or create contrast by combining a centre diamond with complementary side diamonds.
The proportions between the centre and side stones are particularly important in a trilogy ring. Our designers use CAD jewellery design to refine diamond size, spacing, setting height and overall balance before your ring is crafted through our New Zealand jewellery workshop.
Explore our trilogy diamond rings below or personalise a three stone engagement ring around your preferred diamonds, style and budget.
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What Is a Trilogy Diamond Ring?
A trilogy diamond ring is a three stone ring featuring a centre diamond accompanied by two side diamonds. The centre stone is often larger, creating a clear focal point while the side stones add width, brilliance and balance.
Trilogy rings are also commonly called three stone diamond rings or three stone engagement rings. Traditionally, the diamonds represent the past, present and future of a relationship, although many people simply choose the design for its proportions and distinctive three-diamond appearance.
Why Choose a Three Stone Engagement Ring?
A three stone engagement ring creates more diamond presence across the finger than a classic solitaire while still maintaining a clearly defined centre stone.
The side diamonds can enhance the apparent width and brilliance of the design and offer considerably more scope for personalisation. Three matching round diamonds create a traditional trilogy, while combining different diamond cuts can produce a more contemporary design.
The three stones can also be proportioned around the desired overall appearance and budget, allowing emphasis to remain on the centre diamond while using smaller complementary diamonds on either side.
Choosing Diamonds for a Trilogy Ring
The visual balance of a trilogy engagement ring depends on how the three diamonds work together. The size, shape and spacing of the side stones should complement the centre diamond rather than overwhelm it.
Centre and Side Stone Proportions: The balance of a trilogy engagement ring depends on how the three diamonds work together.
Smaller side diamonds place greater visual emphasis on the centre stone and create a more defined transition towards the band. Larger side stones provide more coverage across the finger and can create a stronger three-diamond appearance.
Rather than relying only on carat weight, our designers consider the actual dimensions of each diamond. Two diamonds of the same carat weight can have different widths and lengths, so proportions are assessed using the measurements of the individual stones.
Using CAD jewellery design, we can model the centre and side diamonds together before production and refine their spacing, setting position and overall proportions.
Popular Trilogy Diamond Shape Combinations
Different diamond combinations produce noticeably different styles.
Round brilliant centre with round side diamonds creates the classic trilogy appearance, with strong symmetry and brilliance.
Oval centre diamonds work beautifully with round, pear or complementary elongated side stones, creating an elegant design across the finger.
Emerald cut diamonds can be combined with angular or tapered side stones for a clean, architectural appearance.
Radiant cut diamonds offer the straight edges of an emerald-style shape with additional brilliance and work well in more contemporary trilogy designs.
Cushion cut diamonds create softer proportions and can be paired with round or cushion-shaped sides.
Pear shaped side diamonds can be particularly effective because their tapered outline naturally directs attention towards the centre stone.
If you are unsure which combination works best, our designers can compare different diamond shapes and proportions during the design process.
Natural or Lab-Grown Diamonds
Trilogy rings can be created with either natural or lab-grown diamonds. Natural diamonds are formed within the earth over billions of years and are valued for their natural origin and rarity. Lab-grown diamonds have the same crystal structure and fundamental physical properties as natural diamonds but are created in controlled conditions. They generally allow a larger diamond size or higher specifications for a given budget. Polished Diamonds can source certified natural and lab-grown diamonds and help you compare the options based on size, quality, appearance and price.
Platinum or Gold
Trilogy diamond rings can be made in platinum, white gold, yellow gold or rose gold.
Platinum is naturally white and particularly well suited to diamond settings because of its durability and density.
White gold provides a bright contemporary appearance, while yellow gold creates a warmer contrast with the diamonds.
Rose gold offers a softer colour and can give a trilogy design a more distinctive character.
The best choice depends on your preferred appearance, lifestyle and the jewellery you intend to wear alongside the ring.
Popular Trilogy Diamond Shape Combinations
Trilogy rings can use three diamonds of the same shape or combine different cuts. Three round brilliant diamonds create a classic appearance, while an oval, emerald or radiant centre can be paired with complementary side diamonds to create more distinctive proportions.
Centre Diamond
Side Diamond
Appearance
Round Brilliant
Round Brilliant
Classic and symmetrical
Oval
Round or Pear
Elegant and elongated
Emerald Cut
Tapered/angular sides
Architectural and refined
Radiant
Angular side stones
Contemporary
Cushion
Round or cushion
Soft and traditional
Pear
Complementary side stones
Distinctive and asymmetric character
Custom Trilogy Rings Designed in New Zealand
Every element of a trilogy ring can be adjusted, from the size and shape of the centre diamond to the proportions of the side stones, band width, setting height and metal.
Polished Diamonds uses advanced Computer-Aided Design (CAD) to develop each custom ring before manufacture. This allows the proportions of the selected diamonds and setting to be viewed accurately before the ring enters production.
CAD is particularly useful for trilogy rings because small changes to the size or position of the side diamonds can significantly change the overall appearance.
Once you approve the design, our dedicated New Zealand jewellery workshop crafts the ring, and our team finishes it.
Whether you begin with one of our existing trilogy designs or a completely new idea, our designers can develop a three stone engagement ring around your preferred diamonds, style and budget.
Matching a Wedding Ring to a Trilogy Ring
The position of the side diamonds and the height of the trilogy setting can affect how closely a wedding ring sits alongside the engagement ring.
If you would like a straight wedding band to sit closely against your trilogy ring, this can be considered during the CAD design stage. The setting height, under-bezel and width of the ring can be adjusted where appropriate to create a more cohesive bridal set.
Alternatively, a shaped or fitted wedding ring can be designed around an existing trilogy engagement ring.
Explore our wedding rings or speak with our designers about creating a matching wedding band.
Trilogy Diamond Ring FAQs
What does a trilogy diamond ring mean?
The traditional meaning of a trilogy ring is the past, present and future of a relationship. The three diamonds can also simply be chosen for their appearance, brilliance and greater coverage across the finger.
Is a trilogy ring the same as a three stone engagement ring?
Yes. Trilogy ring and three stone engagement ring are commonly used to describe the same style: a ring featuring three principal diamonds or gemstones positioned together.
What diamond shapes work best in a trilogy ring?
Round brilliant, oval, emerald, radiant, cushion and pear shaped diamonds can all work well. The ideal combination depends on the shape of the centre diamond and the overall proportions you want to achieve.
Can a trilogy ring use lab-grown diamonds?
Yes. Trilogy engagement rings can be made with natural diamonds, lab-grown diamonds or coloured gemstones. Lab-grown diamonds can be particularly useful when greater diamond size is desired within a particular budget.
Are trilogy rings more expensive than solitaire rings?
Not necessarily. Price depends on total diamond weight, diamond quality, metal, and design complexity. A trilogy ring contains three principal stones, but their proportions can be adjusted to suit different budgets.
Can I customise the size of the three diamonds?
Yes. The centre and side stones can be selected individually and their proportions modelled in CAD before manufacture. This allows you to choose whether the centre diamond is strongly dominant or whether the three stones have a more balanced appearance.
Which metal is best for a three stone diamond ring?
Platinum and gold are all suitable choices. Platinum is naturally white and very durable, while white, yellow and rose gold provide different colours and styling options.
Visit Polished Diamonds
Visit Polished Diamonds in Auckland, Wellington or Christchurch to view trilogy diamond rings, compare natural and lab-grown diamonds and discuss a custom design with our team.
Our designers can help you select diamond shapes and proportions, develop the ring in CAD and create a finished design through our New Zealand jewellery workshop.
Explore our trilogy diamond rings online or contact Polished Diamonds to create a custom three stone engagement ring.
Trilogy Diamond Rings: Key Takeaways
A trilogy diamond ring features a centre diamond and two side diamonds, symbolising the past, present, and future of a relationship.
Three stone engagement rings offer more diamond presence and allow for personalisation with various diamond shapes and sizes.
The balance in a trilogy ring depends on the proportions of the centre and side stones, which can be adjusted using CAD design.
Trilogy rings can use either natural or lab-grown diamonds and come in a variety of metals, including platinum and gold.
Custom trilogy rings can be designed in New Zealand, allowing for tailored sizes and styles to meet individual preferences.
