Caesarstone · Quartz
Clamshell
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 .
Uniform warm mid-grey quartz with fine dual-tone speckling — a solid, understated surface with quiet texture.
Caesarstone Clamshell from the Classico collection offers a solid, dependable mid-grey surface with quiet textural depth. Its uniform warm mid-grey base has no veining or directional pattern — just a consistent, almost solid appearance. On closer inspection, a dense granular speckling of very fine particles in slightly lighter off-white and darker grey tones becomes visible, preventing the surface from looking completely flat. The matte, honed finish keeps Clamshell understated and practical. It's one of the most versatile mid-tone surfaces available — dark enough to provide grounding visual weight, light enough to avoid feeling heavy, and neutral enough to work with virtually any colour scheme. The fine speckling disguises everyday marks exceptionally well. Engineered from up to 90% natural quartz minerals by Caesarstone with a lifetime residential warranty. Available in jumbo 3270 × 1640mm slabs with 20mm or 30mm thicknesses. Supplied and installed by In2Stone across Hampshire.
Available Finishes
Ideal For
Performance
How This Stone Performs
Hardness
5 out of 5
Stain Resistance
5 out of 5
UV Resistance
3 out of 5
Heat Resistance
3 out of 5
Scratch Resistance
5 out of 5
Interested in Clamshell?
Love this stone?
Get a free, no-obligation quote for Clamshell quartz. From template to installation, In2stone handles everything — so you can enjoy your new surface without the stress.
Frequently Asked
Questions About Clamshell
What does Caesarstone Clamshell look like?
Is Clamshell a warm or cool grey?
What cabinetry colours work with Clamshell?
How practical is a mid-grey worktop?
Does the honed finish need extra care?
"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
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