The Solitaire

A bolder expression of our foundational design principles. The Solitaire Collection pairs an IGI-certified lab-grown diamond with a smooth, hand-finished 9k solid gold bezel.

Designed without hollowed backs, this three-piece suite brings a distinct presence to the modern wardrobe—bridging the space between subtle daily wear and substantial fine jewellery.

The Solitaire

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Our Inspiration Materials & Design Styling & Versatility Wear & Experience

Our Inspiration

The Solitaire Collection takes its name from solitarius, the Latin origin of solitaire: singular, undisturbed, complete in itself.

Inspired by modernist architecture, where one element can define an entire space, each piece is centred around a single point of light. Clean and considered, it stands alone with quiet presence—simple, striking, and impossible to overlook.

Materials & Design

The Solitaire Collection pairs a Round Brilliant lab-grown diamond with a solid gold bezel setting. The smooth, rounded edge frames and protects the stone, while solid 9k Gold gives the piece its considered weight and presence.

Styling & Versatility

Designed as a simple finishing touch for a well-curated wardrobe. The contoured setting sits comfortably against the skin and layers easily beneath clothing. Wear it alone or with the full suite, it completes an outfit without extra effort.

Wear & Experience

Made to feel as good as it looks. The smooth, rounded setting sits comfortably against the skin, with a solid feel that makes it easy to forget you’re wearing it. Easy to style and made to work with what you already own, it slips effortlessly into your wardrobe—worn alone or layered, day or night.

Our Inspiration

The Solitaire Collection takes its name from solitarius, the Latin origin of solitaire: singular, undisturbed, complete in itself.

Materials & Design

Styling & Versatility

Wear & Experience

The Diamond Guide

Every diamond in our Essential Diamonds collection is selected for its brightness and clarity. We use premium lab-grown diamonds in the F–G colour range with VVS clarity, chosen for their visual purity.

Like mined diamonds, lab-grown diamonds are evaluated using the internationally recognised 4 Cs: Cut, Colour, Clarity, and Carat. Understanding these classifications helps clarify how each stone is graded.

Cut

Cut refers to the precision, alignment, and polish of a diamond’s facets. It dictates how light enters the stone and reflects back to the eye, rather than referring to the raw shape of the stone itself.

What are the most prized cut grades?
The most prized diamonds are those graded Excellent. This grade represents the highest level of cutting precision, where the facet angles and symmetry align perfectly to reflect light with absolute efficiency, preventing any dullness or leakage.

Does cut matter more than carat size?
A diamond’s appearance on the skin relies on the balance of all 4 Cs, with cut playing the most critical role. For a round cut diamond, we select precise, well-proportioned cuts that maximize the surface diameter and light return. This ensures that even smaller, more delicate weights appear clean, distinct, and bright.

Cut

Colour

Colour measures the natural tint present within a white diamond. The industry standard scale established by the GIA runs alphabetically from D, representing completely colourless, down to Z, which indicates a noticeable light yellow or brown tint.

What are the most valuable colour grades?
The most valuable diamonds are those graded D, E, and F. These are completely colourless stones, prized because they have no trace of tint, allowing them to reflect light with absolute purity.

What is the impact?
Subtle shifts in colour tone directly alter how bright a diamond looks once set. While completely colourless stones are the rarest, diamonds in the near-colourless (G–H) range offer identical visual clarity to the naked eye when worn, making them a practical choice for everyday jewellery.

We select diamonds in the F–G range for their clean, bright appearance.

Clarity

Clarity evaluates the internal characteristics (inclusions) and surface markings (blemishes) created during the diamond's growth process. The scale ranges from Flawless (FL) down to Included (I3).

What are the most valuable clarity grades?
The most valuable diamonds are those graded Flawless (FL) and Internally Flawless (IF). These stones contain absolutely no internal inclusions or surface blemishes under 10x magnification, representing the highest tier of structural purity.

Right below these rare classifications sit VVS (Very, Very Slightly Included) diamonds. Because their internal characteristics are completely microscopic, VVS stones offer an identical appearance of total visual purity to the naked eye, making them a practical choice for high-quality everyday wear.

What is the impact?
Clarity determines the visual purity of the stone. Our diamonds are graded VVS (Very, Very Slightly Included), meaning any internal characteristics are entirely microscopic and invisible to the naked eye. This ensures the diamond remains clear and free of visible imperfections in daily wear.

Carat

Carat (abbreviated as 'ct') measures a diamond's physical weight rather than its visual diameter. One carat is equal to exactly 200 milligrams. While carat weight influences value, two diamonds of the exact same weight can look completely different depending on their proportions.

Does carat size matter?
Carat weight determines a stone's mass, but the way a diamond is cut dictates how it actually appears on the skin. A precise, well-proportioned cut maximizes the surface diameter and light return. This ensures that even smaller, more delicate weights—like a 0.2-carat stone—appear clean, bright, and distinct.

Frequently Asked Questions

What are the benefits of a bezel set lab-grown diamond jewellery?

The continuous gold rim encloses the 0.50 ct Round Brilliant lab-grown diamond to protect its outer edges from daily contact and accidental knocks. By covering the rim instead of leaving it exposed, it eliminates sharp edges that catch on clothing and creates a smooth profile that sits comfortably against the skin.

Visually, the gold border frames the diamond cleanly and extends its visible profile slightly beyond the stone's physical edge, giving the piece a distinct, grounded presence on the skin without needing a larger carat weight.

Why is the back of the setting cast solid instead of hollowed out?

Many settings are hollowed out underneath to save on metal weight. We cast ours completely solid, because we believe the part that touches your skin should be considered too.

Rather than hollowing out the setting to reduce the amount of gold used, we cast it completely solid and finish the back with the same smooth, rounded surface as the front. This gives the piece a satisfying sense of weight and keeps the underside clean, without sharp edges or recessed spaces against the skin.

It also means there is nowhere for dust and residue to collect around the back of the stone, helping to keep the diamond looking clear and bright.

It’s a small design decision, but one you notice in the way the piece feels: smooth, balanced and considered from every angle.

What are the diamond specifications for this collection?

Each piece uses an IGI certified 0.50 ct Round Brilliant lab-grown diamond rated D in colour and VVS1 in clarity. This guarantees clean light reflection and diamond purity, backed by independent gemological certification.

Can I wear these pieces in the shower or while swimming?

We recommend taking your pieces off before showering or swimming. While solid 9k Gold and lab-grown diamonds are durable, soap, lotions, oils and chlorine can build up on the gold and diamond, affecting the finish and reducing the stone’s natural brilliance.

For the best long-term appearance, put your jewellery on after applying skincare and take it off before swimming or showering. A quick wipe with a soft, clean cloth after wear will help keep the gold smooth and the diamond bright.

What makes The Solitaire Collection different from the Essential Diamond Collection?

The Essential Diamond Collection uses 0.20 ct stones in soft honeycomb settings as a lightweight everyday layer.

The Solitaire Collection moves up to a larger, IGI certified 0.50 ct round stone held in a thick, solid gold bezel. It brings a more distinct presence to the wardrobe, bridging the space between subtle daily wear and substantial fine jewellery.

DESIGNED IN NEW ZEALAND

Crafted with thoughtful intention and meticulous attention to detail, each piece reflects our commitment to refined craftsmanship and the highest global standards of quality.

ETHICAL & SUSTAINABLE

We prioritise ethically sourced and recycled materials, work with certified partners, and produce in small batches to minimise impact, honouring both people and planet.

CONSCIOUS LUXURY

Crafted in small batches to balance subtle elegance with mindful intention, offering jewellery that feels personal, refined, and considered in every detail.

PERFECTLY PRESENTED

Each piece is beautifully presented in eco-conscious packaging and a luxurious velvet pouch, designed to create a personal and memorable unboxing experience.

Modern Solitaire Jewellery & Fine Essentials in New Zealand

BY TONIN designs modern fine and demi-fine jewellery in New Zealand, engineered for continuous wear, intuitive layering, and considered living. The Solitaire Collection introduces a distinct presence to our foundational line, featuring IGI-certified 0.50 ct lab-grown diamonds enclosed within smooth, hand-finished 360-degree solid 9k gold bezels. Cast completely solid without hollowed backs, each piece balances physical weight and dynamic light refraction to anchor the daily uniform.

Material Standards & Intentional Craft

Every piece in the suite pairs F–G colour, VVS1 clarity lab-grown diamonds with durable solid 9k yellow gold. Designed to transition seamlessly from morning routines to evening wear, our solid gold bezel settings shield stones from daily contact while sitting smoothly against bare skin, tailored outerwear, and dense knitwear.