All Jewellery

Discover the complete MASAAT London collection, bringing lab-grown diamond, natural diamond and coloured gemstone jewellery together in one place. From engagement rings and wedding rings to earrings, necklaces and bracelets, every piece is made to order in the United Kingdom around considered proportions, certified stones and precious metals. Browse the full collection to compare designs across all three collections and find the piece that feels right for you.

Oval Cut Halo Yellow Diamond Bracelet - Fine - 18ct Yellow Gold - 4ct
Oval Cut Halo Yellow Diamond Bracelet

Fine Chain

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£3,499
Pear Cut Halo Yellow Diamond Bracelet - Fine - 18ct Yellow Gold - 4ct
Pear Cut Halo Yellow Diamond Bracelet

Fine Chain

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£3,499
Round Cut Halo Yellow Diamond Bracelet - Fine - 18ct Yellow Gold - 4ct
Round Cut Halo Yellow Diamond Bracelet

Fine Chain

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£3,499
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50 1.70ct Blue Green Tourmaline & Diamond Toi et Moi Ring
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£3,499
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44 1.51ct Deep Green Tourmaline & Diamond Toi et Moi Ring
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£3,499
Three Stone Basket Round Cut Diamond Bracelet - Fine - 18ct Yellow Gold - 4ct
Three Stone Basket Round Cut Diamond Bracelet

Fine Chain

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£3,399
Three Stone Bezel Set Round Cut Diamond Bracelet - Fine - 18ct Yellow Gold - 4ct
Three Stone Bezel Set Round Cut Diamond Bracelet

Fine Chain

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£3,399
Three Stone Marquise Cut Diamond Bracelet - Fine - 18ct Yellow Gold - 4ct
Three Stone Marquise Cut Diamond Bracelet

Fine Chain

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£3,399
Three Stone Pear Cut Diamond Bracelet - Fine - 18ct Yellow Gold - 4ct
Three Stone Pear Cut Diamond Bracelet

Fine Chain

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£3,399
Toi Et Moi Pear & Emerald Cut Diamond Bracelet - Fine - 18ct Yellow Gold - 4ct
Toi Et Moi Pear & Emerald Cut Diamond Bracelet

Fine Chain

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£3,399
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43 1.71ct Emerald Cut Aquamarine & Diamond Trilogy Ring
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£3,299
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10 2.90ct Aquamarine & Diamond Bezel Set Chain Necklace
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£3,299
Half-Eternity Round Cut Blue Diamond Ring - 18ct Yellow Gold
Half-Eternity Round Cut Blue Diamond Ring
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£3,199
Half-Eternity Emerald Cut Blue Diamond Ring - 18ct Yellow Gold
Half-Eternity Emerald Cut Blue Diamond Ring
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£3,199
Pear Cut North-South Halo Yellow Diamond Necklace - Fine - 18ct Yellow Gold - 1.5ct
Pear Cut North-South Halo Yellow Diamond Necklace

Fine Chain

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£3,199
Pear Cut North-South Bezel Set Halo Yellow Diamond Necklace - Fine - 18ct Yellow Gold - 1.5ct
Pear Cut North-South Bezel Set Halo Yellow Diamond Necklace

Fine Chain

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£3,199
Heart Cut Halo Yellow Diamond Necklace - Fine - 18ct Yellow Gold - 1.5ct
Heart Cut Halo Yellow Diamond Necklace

Fine Chain

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£3,199
Marquise Cut Halo Yellow Diamond Necklace - Fine - 18ct Yellow Gold - 1.5ct
Marquise Cut Halo Yellow Diamond Necklace

Fine Chain

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£3,199
Heart Cut Bezel Set Halo Yellow Diamond Necklace - Fine - 18ct Yellow Gold - 1.5ct
Heart Cut Bezel Set Halo Yellow Diamond Necklace

Fine Chain

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£3,199
Marquise Cut Bezel Set Halo Yellow Diamond Necklace - Fine - 18ct Yellow Gold - 1.5ct
Marquise Cut Bezel Set Halo Yellow Diamond Necklace

Fine Chain

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£3,199
Oval Cut East-West Halo Yellow Diamond Necklace - Fine - 18ct Yellow Gold - 1.5ct
Oval Cut East-West Halo Yellow Diamond Necklace

Fine Chain

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£3,199
Oval Cut East-West Bezel Set Halo Yellow Diamond Necklace - Fine - 18ct Yellow Gold - 1.5ct
Oval Cut East-West Bezel Set Halo Yellow Diamond Necklace

Fine Chain

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£3,199
Emerald Cut Halo Diamond Bracelet - Fine - 18ct Yellow Gold - 4ct
Emerald Cut Halo Diamond Bracelet

Fine Chain

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£3,199
Marquise Cut Halo Diamond Bracelet - Fine - 18ct Yellow Gold - 4ct
Marquise Cut Halo Diamond Bracelet

Fine Chain

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£3,199

Showing 313336 of 1092 products

Explore Fine Jewellery

Browsing the whole collection at once is the easiest way to see how our designs relate to one another. Delicate everyday pieces sit alongside more distinctive designs where the stone is the focal point, so you can gauge scale, proportion and presence before narrowing by category.

Use the filters to work through the collection by metal, stone colour, cut and price, or by collection where you already know whether you are looking for a lab-grown diamond, a natural diamond or a coloured gemstone.

Rings, Earrings, Necklaces & Bracelets

Each category offers a different way to wear a stone. Rings make it a visible part of your everyday style, earrings introduce it close to the face, necklaces create a considered focal point and bracelets add easily to a collection you already wear.

Explore all rings, all earrings, all necklaces and all bracelets, or go straight to the bridal edits — engagement rings and wedding rings.

Lumen, Heirloom & Atlas

Our jewellery is organised into three collections. Lumen is lab-grown diamond jewellery, each stone IGI-graded so cut, colour, clarity and carat weight are documented rather than assumed. Heirloom is natural diamond jewellery, independently graded by GIA. Atlas is coloured gemstone jewellery — emerald, aquamarine and tourmaline set in 18ct gold and platinum.

Browse each in full: All Lumen, All Heirloom and All Atlas.

Choosing Your Jewellery

When comparing pieces, look at the stone's cut, proportions and setting alongside the overall design rather than at carat alone. The precious metal matters too: white gold reads clean and contemporary, yellow gold offers warmer contrast, rose gold a softer tone and platinum a classic alternative.

Think about how often you expect to wear the piece and how it will sit with the jewellery you already own. The best choice balances the stone's characteristics against the way you intend to wear it.

Frequently Asked Questions

Our collection spans rings, earrings, necklaces and bracelets in lab-grown diamond, natural diamond and coloured gemstone designs, including dedicated engagement ring and wedding ring edits.

Lumen is lab-grown diamond jewellery, IGI-graded. Heirloom is natural diamond jewellery, GIA-graded. Atlas is coloured gemstone jewellery — emerald, aquamarine and tourmaline set in 18ct gold and platinum.

Consider the jewellery type, stone shape, carat, colour, clarity, setting and metal together, then weigh those details against your personal style and how often you plan to wear the piece.