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.

Toi-et Moi Pear & Emerald Cut Yellow Diamond Pave Band Ring - Platinum (950) - 4ct
Toi-et Moi Pear & Emerald Cut Yellow Diamond Pave Band Ring
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£18,899
Toi-et Moi Pear & Emerald Cut Diamond Pave Band Ring - 18ct Yellow Gold - 4ct
Toi-et Moi Pear & Emerald Cut Diamond Pave Band Ring
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£17,899
Diamond Bangle - 18ct Yellow Gold -
Diamond Bangle
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£15,999
Emerald & Round Cut Diamond Tennis Bracelet - 18ct Yellow Gold -
Emerald & Round Cut Diamond Tennis Bracelet
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£15,999
Emerald & Round Cut Yellow Diamond Tennis Bracelet - 18ct Yellow Gold -
Emerald & Round Cut Yellow Diamond Tennis Bracelet
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£15,999
Round Cut Diamond Tennis Bracelet - 18ct Yellow Gold -
Round Cut Diamond Tennis Bracelet
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£15,999
Round Cut Yellow Diamond Tennis Bracelet - 18ct Yellow Gold -
Round Cut Yellow Diamond Tennis Bracelet
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£15,999
Toi-et Moi Oval Cut Yellow Diamond Pave Band Ring - Platinum (950) - 4ct
Toi-et Moi Oval Cut Yellow Diamond Pave Band Ring
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£15,899
Toi-et Moi Pear & Emerald Cut Yellow Diamond Ring - Platinum (950) - 4ct
Toi-et Moi Pear & Emerald Cut Yellow Diamond Ring
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£15,599
Toi-et Moi Oval Cut Diamond Pave Band Ring - 18ct Yellow Gold - 4ct
Toi-et Moi Oval Cut Diamond Pave Band Ring
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£14,899
Toi-et Moi Pear & Emerald Cut Diamond Ring - 18ct Yellow Gold - 4ct
Toi-et Moi Pear & Emerald Cut Diamond Ring
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£14,799
Toi-et Moi Oval Cut Yellow Diamond Ring - Platinum (950) - 4ct
Toi-et Moi Oval Cut Yellow Diamond Ring
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£13,199
Toi-et Moi Emerald Cut Yellow Diamond Pave Band Ring - Platinum (950) - 4ct
Toi-et Moi Emerald Cut Yellow Diamond Pave Band Ring
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£12,899
25 4.03ct Round Cut Natural Diamond Eternity Ring
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£12,799
Toi-et Moi Oval Cut Diamond Ring - 18ct Yellow Gold - 4ct
Toi-et Moi Oval Cut Diamond Ring
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£12,199
Toi-et Moi Emerald Cut Diamond Pave Band Ring - 18ct Yellow Gold - 4ct
Toi-et Moi Emerald Cut Diamond Pave Band Ring
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£11,899
Toi-et Moi Emerald Cut Yellow Diamond Ring - Platinum (950) - 4ct
Toi-et Moi Emerald Cut Yellow Diamond Ring
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£10,699
Unica Toi-et Moi Emerald & Asscher Cut Yellow Diamond Ring - Platinum (950) - 4ct
Unica Toi-et Moi Emerald & Asscher Cut Yellow Diamond Ring
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£10,499
Unica Toi-et Moi Emerald & Asscher Cut Diamond Ring - 18ct Yellow Gold - 4ct
Unica Toi-et Moi Emerald & Asscher Cut Diamond Ring
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£10,499
Toi-et Moi Emerald Cut Diamond Ring - 18ct Yellow Gold - 4ct
Toi-et Moi Emerald Cut Diamond Ring
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£9,999
Three Stone Trilogy Oval & Pear Cut Yellow Diamond Pave Band Ring - Platinum (950) - 4ct
Three Stone Trilogy Oval & Pear Cut Yellow Diamond Pave Band Ring
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£9,899
Three Stone Trilogy Oval & Pear Cut Diamond Pave Band Ring - 18ct Yellow Gold - 4ct
Three Stone Trilogy Oval & Pear Cut Diamond Pave Band Ring
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£9,899
Three Stone Trilogy Marquise & Oval Cut Yellow Diamond Pave Band Ring - Platinum (950) - 4ct
Three Stone Trilogy Marquise & Oval Cut Yellow Diamond Pave Band Ring
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£9,899
Three Stone Trilogy Marquise & Oval Cut Diamond Pave Band Ring - 18ct Yellow Gold - 4ct
Three Stone Trilogy Marquise & Oval Cut Diamond Pave Band Ring
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£9,899

Showing 124 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.