Triformis Emerald Cut Trilogy Engagement Ring

About This Design

Emerald cut trilogy engagement rings have a presence that other styles simply cannot match. Three stones, clean lines, and a geometry that feels deliberate and considered. The Triformis takes that foundation and refines it. A 2.5 carat emerald cut diamond sits at the centre, flanked by two matching trapezoid step cut diamonds that follow the angular lines of the main stone perfectly. The result is a three stone emerald cut ring where every element belongs together.

The name Triformis comes from the Latin for three-shaped, a reference to the three distinct geometric forms working in harmony. The emerald cut and the trapezoids share the same step cut faceting, which means light moves through the stones in long, clean flashes rather than the scattered sparkle of a brilliant cut. It gives the ring a confidence and sophistication that suits people who are drawn to architecture as much as jewellery.

What sets the Triformis apart from most trilogy engagement rings is the contrast between the two metals. The band is 18ct yellow gold with a slight court profile, warm and comfortable on the finger. The head is platinum, deliberately chosen so that the white metal disappears against the diamonds and all you see is stone. That two-tone construction is not just aesthetic. It makes the diamonds appear larger and more vivid because there is no colour interruption between metal and stone.

The centre diamond is held by four talon claws, a deliberate contrast to the round claw settings on the trapezoid side stones. The talons grip the main stone with a sharper, more angular profile that sets it apart as the focal point while the softer round claws on the flanking stones keep everything balanced. It is a subtle difference, but it gives the ring a hierarchy that draws your eye to the centre first and then outward.

Design Details

The Triformis is a three stone emerald cut diamond ring built around proportion and precision. The 2.5 carat emerald cut centre stone sits in a four-talon claw setting, with each talon shaped to complement the angular facets of the step cut. The two flanking trapezoid diamonds are round claw set, creating a deliberate contrast in claw style that gives the centre stone its own identity within the trio.

Each of the three stones sits in its own individual basket, and the through-finger view reveals the structural finesse of how the three baskets relate to one another. Open daylight shoulders allow light to pass beneath the stones and through the gallery, which is essential for step cut diamonds where transparency and depth of light are everything.

The band is 18ct yellow gold with a parallel, slight court profile. Court profiles have a gentle curve on the inside of the band, making it more comfortable for everyday wear than a flat profile. The parallel width keeps the proportions consistent from front to back without tapering.

The head is platinum. Because platinum is naturally white and never needs rhodium plating, the claws and baskets holding the diamonds will look exactly the same in ten years as they do today. The contrast between the warm yellow gold band and the cool platinum head gives the Triformis a two-tone character that is both contemporary and timeless.

For wedding ring compatibility, a straight band will sit flush against the Triformis. The three-stone design sits above the band line without any shoulders or detailing that would create a gap. A plain wedding ring in matching 18ct yellow gold would be the natural pairing.

Your Diamond

The Triformis shown here features a 2.5 carat IGI certified lab-grown emerald cut diamond with excellent optics and minimal light leakage, paired with matching quality trapezoid step cut side stones. Every stone in the trio was selected to work together, with consistent colour, clarity, and cut quality across all three.

Lab-grown diamonds are chemically, optically, and physically identical to mined diamonds. They are real diamonds, certified independently by the IGI or GIA. Our lab-grown diamonds are graded to D or E colour with VS1 to VVS1 clarity and an Excellent or Ideal cut.

The Triformis is also available with natural diamonds. For a natural diamond version, we source stones individually to match your requirements. Get in touch for a natural diamond quote.

How It Works

The Triformis is a bespoke trilogy ring, so pricing and specification are tailored to each order. Book a consultation at our Didsbury or Manchester city centre studio and we will walk you through diamond options, metal choices, and carat weights to build your perfect emerald cut trilogy engagement ring. We provide a detailed quote with no obligation.

Crafted by Hand

Every Si Vis Amari ring is handcrafted individually and hallmarked at the Birmingham Assay Office in accordance with UK law. The Triformis is made specifically for you by experienced craftspeople who understand that every piece tells a story. This is not mass-produced jewellery. It is a three stone emerald cut engagement ring made once, for one person, by hand.

Frequently Asked Questions

What are the side stones in the Triformis emerald cut trilogy ring?

The Triformis uses trapezoid step cut diamonds as side stones, not the baguettes or trillion cuts you see on many three stone emerald cut rings. Trapezoids are cut specifically to follow the angular lines of an emerald cut centre stone, creating a seamless geometric flow across all three diamonds. The step cut faceting matches the emerald cut, so light moves through the trio in the same clean, linear pattern rather than creating a visual mismatch between brilliant and step cut stones.

Why does the Triformis use two different metals?

The 18ct yellow gold band and platinum head are a deliberate design choice. Platinum is naturally white, so the claws and baskets holding the diamonds blend into the stones rather than adding colour. This makes the diamonds appear larger and more vivid. The yellow gold band provides warmth and contrast that gives the ring its two-tone character. Because platinum does not require rhodium plating, the head will remain bright white permanently without any maintenance.

Can I order the Triformis with a different centre stone shape?

The Triformis was designed specifically around the emerald cut and its relationship with the trapezoid side stones. The geometry of all three stones works together because they share the same step cut faceting. If you are interested in a trilogy ring with a different centre stone shape, such as a round brilliant or oval, we would recommend looking at our trilogy collection or designing a bespoke piece around your preferred shape.

How much does an emerald cut trilogy engagement ring cost?

The price of the Triformis depends on your choice of diamond specification, carat weight, and whether you choose lab-grown or natural diamonds. As a trilogy ring with three individually selected stones, the total diamond weight has the biggest impact on cost. Book a consultation at our Didsbury or Manchester studio for a detailed, no-obligation quote.

What makes the talon claw setting different from the round claws on the side stones?

The four talon claws on the centre stone have a sharper, more angular profile that grips the emerald cut diamond with visible structure and intent. The round claws on the trapezoid side stones are softer and less prominent, which creates a visual hierarchy across the three stones. Your eye is drawn to the centre stone first because the talon claws frame it with more authority, while the round claws let the side stones support without competing. It is a small detail that makes a significant difference to how the ring reads on the finger.