In2stone
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Unistone Diamant Quartz

Unistone · Quartz

Diamant

25+ Years Experience
1,500+ Projects Completed
4.9 from 100+ Reviews
Free No-Obligation Quote

Full Service — Installation

Our quartz range is available with full supply, templating, fabrication and installation across Portsmouth, Fareham, Gosport, Havant, Waterlooville, Chichester, Southampton and the surrounding area, with our services extending to Hampshire, Sussex, Surrey, Dorset and Berkshire . The reach of our installation service depends on the type of project — contact us to discuss your requirements.

Supply & Fabrication — UK Wide

Outside our installation area? We can fabricate quartz to your supplied template, or supply the stone directly as-is — anywhere in the UK . Learn more .

The Stone

See the natural beauty of Diamant up close — the surface texture, colour depth, and veining that make this quartz unique.

Colour:

Grey Brown Charcoal

Light warm grey quartz with bold dark charcoal veining and intricate grey undercurrents — a dramatic marble surface.

Unistone Diamant commands attention with bold, sweeping veining on a warm grey canvas. Its light warm grey base provides a soft yet distinct backdrop for prominent medium to broad veins in deep dark brown-grey or charcoal that dramatically traverse the surface in largely diagonal, sweeping movements. Beneath these bold lines, a dense intricate network of finer lighter grey veining subtly swirls and feathers across the background, adding depth and natural complexity. The polished finish reflects light gently, bringing the high-contrast interplay between the bold charcoal veining and the intricate lighter undercurrents into focus. Diamant has a genuinely geological quality — the layered veining suggests stone that was formed under immense pressure. Manufactured by Brachot with Through Tone Technology. Over 90% natural quartz, NSF certified. 15-year warranty. Available in standard and jumbo slab formats. Supplied and installed by In2Stone across Hampshire.

Performance

How This Stone Performs

Hardness

7 out of 5

Stain Resistance

5 out of 5

UV Resistance

3 out of 5

Heat Resistance

4 out of 5

Scratch Resistance

5 out of 5

Interested in Diamant?

Love this stone?

Get a free, no-obligation quote for Diamant quartz. From template to installation, In2stone handles everything — so you can enjoy your new surface without the stress.

Unistone Diamant Quartz slab

Frequently Asked

Questions About Diamant

What does Unistone Diamant look like?
Diamant has a light warm grey base with prominent medium to broad veining in deep dark brown-grey or charcoal, sweeping diagonally. Beneath the bold veins, a dense network of finer lighter grey veining subtly swirls and feathers. The polished finish reflects light gently. It's a dramatic, layered marble-effect with genuine geological complexity.
Is Diamant a marble design or a granite design?
Diamant is firmly a marble-effect design — the sweeping diagonal veining and flowing movement are characteristic of marble rather than the crystalline speckling of granite. The warm grey base with charcoal veining creates a stone aesthetic reminiscent of heavily veined natural marble varieties like Grigio Carnico.
What makes the layered veining distinctive?
Diamant operates on two levels simultaneously — bold, dominant charcoal veins provide dramatic structure, while finer lighter grey veining swirls and feathers beneath them, creating a background of subtle complexity. This dual-layer quality gives the surface genuine depth and natural authenticity that single-layer designs can't match.
What kitchen styles suit Diamant?
The dramatic, high-contrast character suits contemporary, industrial-luxe, and statement kitchen designs. Dark charcoal or navy cabinetry creates a moody, enveloping scheme. White cabinetry provides stark contrast. The warm grey base connects well with brushed chrome, matt black, or gunmetal hardware. Keep surrounding elements simple to let the bold veining dominate.
Does Through Tone Technology work with bold veining?
Through Tone Technology is particularly valuable with bold, veined designs like Diamant. The dramatic charcoal veining continues through the full slab thickness, meaning cut edges and waterfall installations show the same bold marble character. Without this technology, exposed edges would reveal a blank quartz core.
★★★★★
"Excellent Service and Beautiful Results - Highly Recommended! I recently had In2stone install new quartz worktops in my kitchen, and I couldn't be happier with the results. From start to finish, the experience was completely stress-free. The team was not only competitively priced but also incredibly friendly and professional throughout the entire process. They handled everything seamlessly - removing the existing sink, hob, and old laminate worktops before fitting the new quartz surfaces. The finished worktops are absolutely beautiful and have transformed my kitchen into a modern, minimalist space that I love spending time in. The quality of workmanship is outstanding, and the attention to detail really shows. I'm a very satisfied customer and would highly recommend In2stone to anyone considering new worktops. Well done to the entire team - you've exceeded my expectations!"
— Ashley ChapmanGoogle Review

Why Choose Us

Why In2stone

Invisible Joins & Ogee Edging

The edge profiles and seamless joins other suppliers say they can't do? We do them every week.

"Other quartz suppliers weren't able to offer the ogee edging I wanted — In2stone could."

Olivia Tett

The Quote Is the Price

No hidden costs, no surprises. We consistently beat competitor quotes — even online discounters decline to match us.

"Beat 6 other companies by a mile. Even an online company that claims to beat any quote declined to."

Dean Fitzpatrick

Ian Answers the Phone

No answering machines or sales scripts. You'll speak to the people who'll actually work on your project.

"Ian always answered the phone or called me back — and that was before we even decided to use him."

Carly Rielly