A stone-led approach

We don’t just work with diamonds — we work with stones in the truest sense: diamonds, coloured gemstones, and the rare, character-filled cuts that make a piece feel like it already has a story. Think of this as the beginning of a modern heirloom: we start with what you’re drawn to, then build the design around it.

Everything is chosen with longevity in mind — colour that holds its depth, proportions that wear beautifully, and details you’ll still love years from now (and someone else will love after you).

Sustainably grown, carefully curated

Our stones are sustainably grown and sourced through a small handful of specialist growers and partners — a tight circle that gives us real control over quality, consistency, and traceability. We favour relationships over volume, so we can curate stones with confidence and bring you options that feel genuinely special.

And because we’re not limited to a public catalogue, we can source beyond what you see here — including unique shapes, nuanced colours, and old-world cuts that are increasingly hard to find.

Where old-world craft meets modern heirlooms

Cutting is where a stone’s personality shows up. We work with expert cutters who understand that brilliance isn’t just about numbers — it’s about balance, symmetry, and the way a stone comes alive in real light. This is also how we access those heirloom-style details we love: softer silhouettes, chunkier facets, and vintage-inspired cuts refined for modern wear.

It’s careful, skilled work — and it’s what allows us to create pieces that feel intimate and enduring. Not just jewellery for a moment, but modern heirlooms made to carry forward.

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BESPOKE ENQUIRY

At MARLII LAB, we meticulously select diamonds to match each client's unique needs, guaranteeing the finest stone available at any given moment.

Our diamond specialist, driven by a fervent commitment to ethical sourcing, only chooses IGI certified stones that surpass our rigorous standards in terms of colour, clarity, and cut.

To initiate the process, please complete the form below, specifying your preferred carat size and budget. Our dedicated customer service team will respond to your request within 24 business hours.

Please be aware that, due to their unique nature, we cannot accommodate exchanges or returns for bespoke items.