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The House of Gemstones

Long Octagon Tourmaline & Diamond Halo Necklace

Long Octagon Tourmaline & Diamond Halo Necklace

Regular price £10,500.00 GBP
Regular price Sale price £10,500.00 GBP
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Made to Order
Created especially for you · Approx. 4–6 weeks
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Marcus Tempus

Product Story

Exceptional colour and dramatic proportions define this striking tourmaline and diamond necklace.

At its centre sits a natural tourmaline cut into an elongated step-cut octagon, creating crisp architectural facets that showcase the gemstone's remarkable depth of colour. Its long, elegant proportions give the stone a distinctive presence while retaining the clean geometry characteristic of an emerald-style step cut.

A delicate halo of brilliant-cut diamonds follows the outline of the tourmaline, creating a precise frame of light around the coloured centre stone. Crafted in 18ct white gold, the cool-toned setting allows both the tourmaline and diamonds to remain beautifully bright and defined.

Suspended from a fine 18ct white gold chain, the simplicity of the setting keeps the extraordinary gemstone firmly at the centre of the design.

Made to order with an approximate lead time of 4–6 weeks.

Part of The House of Gemstones at Marcus Tempus, this is a piece created around what we value most in exceptional coloured gemstone jewellery — remarkable colour, individuality and presence.

Features

Natural tourmaline
Elongated step-cut octagonal gemstone
Brilliant-cut diamond halo
Crafted in 18ct white gold
Fine 18ct white gold chain
Contemporary geometric design
Made to order
Approximate lead time: 4–6 weeks
October birthstone
Part of The House of Gemstones

Why We Love It

The proportions make this extraordinary. The elongated tourmaline creates an almost architectural centrepiece, while the diamond halo traces its unusual shape rather than competing with it. Bold in scale, clean in design and completely centred around the beauty of the gemstone.

Marcus Tempus Gemstone Passport MT-GP-008
Faceted natural tourmaline gemstone

The House of Gemstones

Tourmaline Passport

October Birthstone • Tourmaline • Mohs 7–7.5
Mineral Family Tourmaline Group
Colour Almost every colour, including pink, green, blue, bi-colour and watermelon
Hardness 7–7.5 Mohs
Wearability Excellent for regular wear with sensible care
Notable Sources Brazil
Mozambique
Nigeria
Afghanistan
Clarity Varies by colour; many fine stones are eye-clean

Why We Treasure Tourmaline

Tourmaline is one of the world’s most fascinating gemstones, admired for its extraordinary range of colours. Few gemstones offer such diversity, from delicate pastel shades to intense vivid hues and remarkable bi-colour crystals.

Its versatility allows every piece of tourmaline jewellery to possess its own distinct personality, making it a favourite among collectors and those seeking something truly individual.

Natural rough tourmaline crystal

Nature’s Artistry

Tourmaline crystals naturally grow in long, beautifully striated prisms. Some display several colours within one crystal, creating treasured watermelon and bi-colour varieties.

Caring for Tourmaline

Clean tourmaline jewellery using lukewarm water, mild soap and a soft brush. Avoid sudden impacts, harsh chemicals and rapid temperature changes.

Store tourmaline separately from harder gemstones to help preserve its polished finish. Remove jewellery before strenuous activities.

Marcus Tempus Bespoke

Crafted Around Your Preferences

Many Marcus Tempus tourmaline jewellery designs can be individually crafted to suit your personal style. Where the design allows, we can often create a piece in your preferred precious metal or with an alternative natural gemstone from our collection.

Often Crafted In

9ct Gold 14ct Gold 18ct Gold Yellow Gold White Gold Rose Gold Platinum

Alternative Gemstone Options

Pink Tourmaline Green Tourmaline Watermelon Tourmaline Rubellite Sapphire Aquamarine

Availability varies according to the design, gemstone and stone dimensions. Not every gemstone is suitable for every setting, and some combinations may require small design adjustments.

Enquire About Bespoke Options →
Marcus Tempus gold seal

Every gemstone begins deep within the Earth.

Its next chapter
begins with you.

The House of Gemstones