Engineered quartz

Caesarstone® Quarz 4130 Clamshell

Caesarstone® 4130 Clamshell is a warm pearl-coloured selection from the Israeli engineered quartz manufacturer Caesarstone, part of the Concrete series. The polished or C400-honed slab shows a calm, slightly warm greige-toned pearl grey base tone with discreet, organically distributed lighter clouds and small mineral dots – stylistically an allusion to the warm, mother-of-pearl-like shimmering inside of a shell. At ROSSITTIS we fabricate the large-format slabs into kitchen worktops, washstands, wall claddings, interior stairs, window sills and made-to-measure interior components with a restrained, elegant pearl-coloured character.

Engineered quartz material from the Caesarstone Concrete series (Caesarstone Ltd., Israel), based on high-purity natural quartz aggregates (≈ 90–93 % quartz, ≈ 7–10 % polyester resin) – not a naturally formed stone. Variant 4130 “Clamshell” with a warm greige, mother-of-pearl base tone in a shell-coloured character.

Engineered quartz

Available as: Slabs · 4 of 26 reserved

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About Caesarstone® Quarz 4130 Clamshell

Background. Caesarstone was founded in 1987 at Kibbutz Sdot Yam in Israel and is regarded as one of the pioneers of industrial engineered quartz slab production. The company produces its slabs in the Bretonstone® vacuum vibration compaction process and has for decades been one of the globally leading brands in this material segment. The variant presented here, 4130 Clamshell, comes from the brand's Concrete series (4xxx coding), which in design terms was originally oriented towards raw exposed-concrete characters – within it, however, Clamshell occupies a warm greige special position with a discreetly mother-of-pearl-like character.

Material composition. A classic Caesarstone quartz slab consists of around 90–93 % natural quartz (SiO₂), about 7–10 % polymer binder on a polyester resin basis as well as pigments and mineral additives. Quartz has a Mohs hardness of 7 (compared with calcitic marble at Mohs 3) – which makes engineered quartz slabs considerably more scratch-resistant, more acid-resistant and non-porous. In spring 2024, alongside the classic quartz line, Caesarstone launched the Mineral™ line, in which a large proportion of the crystalline quartz has been replaced by other mineral aggregates – this changeover is a direct response to the global discourse on the risk of silicosis during fabrication; the selection documented here, 4130 Clamshell, corresponds to the historical quartz mixture.

The 4130 Clamshell variant. In design terms, Clamshell is one of the warmest selections in the Concrete series. The base tone is a light, slightly warm greige-toned pearl grey with discreet rosé-pearl-mauve undertones – neither clinically cool nor purely neutral, but a warm, organic natural tone. Distributed across the base tone are discreetly cloudy light patches and small mineral stipplings that work like the warm mother-of-pearl inside of a shell. The image is calm and balanced – not as dramatic as the sweep and wash structures of other Concrete selections (4033 Rugged, 712B Wet Concrete), but also not as completely uniform as 4030 Oyster or 4003 Sleek Concrete. The name “Clamshell” refers precisely to this warm mother-of-pearl shell character.

Format and fabrication. Caesarstone supplies the slabs in the standard format 306 × 144 cm as well as the jumbo format 327 × 162 cm, in thicknesses of 2 and 3 cm; individual lines also in 1.2 cm and 0.6 cm (Caesarstone Slim) for wall claddings and furniture fronts. The slabs can be cut, profiled, drilled and edge-worked with diamond tooling. Standard edges are square, chamfered (V-chamfer, 45°), rounded (R3, R5) and executed profile edges such as bullnose, half-round or a mitred edge joint for 90° corner connections.

Thermal and chemical properties. Engineered quartz is considerably more acid-resistant than marble, because the quartz aggregates are themselves inert to acid and the polyester makes up only a small volume fraction. Even so, the following applies: highly concentrated acids (hydrochloric, sulphuric, nitric acid) and aggressive industrial chemicals attack the binder. Heat resistance extends to about 150 °C for short periods; hot pots, frying pans or baking trays must never be set down directly on the surface, because direct heat over points can cause discolouration or stress cracks. UV resistance is limited – the slab is clearly conceived as an interior material and should not be permanently installed in fully sunlit conservatories or open loggias.

The ROSSITTIS range. The surface finishes available in stock are listed in the »Finishes« block further down. From these we fabricate kitchen worktops (standard and island), washbasin tops, wall claddings (including kitchen splashbacks and bathroom walls), interior stairs with treads and risers, window sills, skirtings, bar counters, buffet and furniture tops as well as floor areas for high-quality living spaces. The warm mother-of-pearl tone is particularly flexible in design terms: it combines well with white cabinet fronts, light oak, brushed steel, brass, bronze and mid-tone to light wall paints with a warm nuance.

Comparison. Within the Concrete series, Clamshell is the warmest selection – stylistically related to 4023 Topus (distinctly rosé-taupe), 4030 Oyster (cool mid-grey) and 4044 Airy Concrete (light grey). In tonal value, Clamshell lies between Topus (warmer) and Oyster (cooler) and takes a warm mother-of-pearl middle position. Against the Calacatta-look selections (5000 London Grey, 5141 Frosty Carrina), any veining is absent – Clamshell is a calm, solid-colour-oriented slab with a subtle cloud texture. Against porcelain (Laminam Pietra di Savoia, GEOLUXE), the slab remains warmer to the touch and less brittle, but is thermally and chemically somewhat less resilient overall.

Warranty and brand. Caesarstone offers the “Caesarstone Forever” lifetime warranty on its slabs in residential applications, with clearly defined care and fabrication conditions. The brand is established across Europe among architects, interior fitters and premium kitchen studios.

Our honest assessment. 4130 Clamshell is a choice for clients and architects looking for a warm, elegant, mother-of-pearl-toned engineered stone appearance that mediates between classic greige selections and purer Concrete slabs. The warm mother-of-pearl tone is more forgiving of water droplets and fingerprints than pure white slabs and suits classically Mediterranean as well as contemporary warm living concepts. Anyone looking for a characterful natural material appearance with veining is better served by other selections.

In stock

Current availability from our warehouse.

26 quartz composite slabs in stock — 22 available now, 4 reserved · plus 5 blocks

Thicknesses: 1.3–3 cm · Finishes: Polished, Honed C400 · Available as: Slabs

Updated daily from our live stock.

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Finishes

Caesarstone® Quarz 4130 Clamshell is available in a range of finishes. The finish affects appearance, feel and the care it needs.

Polished

A glossy surface with the highest possible degree of colour intensity — the standard finish in the engineered stone and engineered quartz segment. Easy to care for in everyday use and resistant to common household acids. A prestigious choice for kitchen worktops, wall claddings and exposed surfaces with a classic high-gloss character.

Honed C400

A level, matt surface created by fine honing with C400 grit — it appears more restrained than the more colour-intense polished version and is somewhat more maintenance-intensive. A characterful matt alternative for modern kitchen islands and wall claddings where high gloss would be out of place.

Care & fabrication

Cleaning. In everyday use, warm water, a soft cloth or a clean mop and a neutral to slightly alkaline pH cleaner are sufficient. Soapy engineered stone cleaners, mild all-purpose cleaners, mild washing-up foam and special engineered quartz care products are suitable. Caesarstone recommends its own care products (Caesarstone Cleaner) – these are not essential, but well matched. Take up spilt liquids – wine, coffee, juices, oil – promptly in everyday use.

Do not use. Concentrated acids (sulphuric, hydrochloric, nitric acid), concrete and rust removers, paint strippers, oven cleaners, acetone, petrol, thinners, nitro cleaners and very strongly alkaline industrial cleaners are off limits – they can attack the polyester resin. Also avoid chlorine-based bleaches in high concentration. Do without abrasive pads (steel wool, green scouring pads); scratching is undesirable on the polished surface.

Impregnation. A classic natural stone impregnation is not necessary – engineered quartz is inherently dense and non-porous, and water absorption is below 0.05 %. A sealant would tend to show on the surface as a veil.

Kitchen. 4130 Clamshell is a classic kitchen material. Despite its high material hardness and acid resistance, the following applies: use chopping boards (knife marks can leave the polyester resin matt over time) and use trivets for hot pots and pans – direct heat over points can cause local discolouration. Direct contact with a hot baking tray (above about 150 °C) risks stress cracks. On site, the dishwasher must not run in full contact directly beneath the slab – heat protection is standard practice. On the warm mother-of-pearl slab, dark stains (red wine, coffee, berry juice) are visually far less conspicuous than on a solid white slab.

Bathroom. In the bathroom, Clamshell is very well suited as a washstand, wall cladding, bath surround and shower. Do not use anti-limescale sprays and limescale-dissolving bathroom cleaners in high concentration, and wipe standing water away promptly in the shower area so that a limescale film cannot build up.

Floors and stairs. On floor areas we recommend the polished variant in prestigious interiors and the C400 variant for heavily loaded areas and stairs.

Outdoors and frost. Not suitable for external construction. Polyester binder yellows under UV radiation, and freeze-thaw cycles can lead to micro defects. Nor is it recommended for permanent use in fully sunlit conservatories or open loggias – Caesarstone explicitly excludes external use and fully sunlit interior surfaces from the warranty.

Warranty and repair. In the residential sector Caesarstone grants a lifetime warranty against material and manufacturing defects (“Caesarstone Forever”), subject to fabrication and care to standard by certified specialist firms. The surface finishes available in stock are listed in the »Finishes« block further down.

Frequently asked questions

What kind of material is Caesarstone® 4130 Clamshell?

It is an engineered quartz stone from the Israeli manufacturer Caesarstone, part of the Concrete series. High-purity natural quartz aggregates (around 90–93 % by volume) are compacted into large-format slabs with about 7–10 % polyester resin, pigments and additives in the Bretonstone® vacuum process. In design terms, the 4130 variant is conceived for a warm mother-of-pearl greige character.

How is the appearance of Clamshell to be characterised?

A light, slightly warm greige-toned pearl grey with discreet rosé-pearl-mauve undertones, run through with cloudy lighter patches and small mineral dots. Stylistically an allusion to the warm mother-of-pearl inside of a shell.

Where does Clamshell sit compared with other Concrete selections?

Clamshell is the warm mother-of-pearl selection of the Concrete series – warmer than 4030 Oyster (cool mid-grey) and 4044 Airy Concrete (light grey), cooler than 4023 Topus Concrete (distinctly rosé-taupe) and 4230 Shitake (warm fossiliferous limestone). A balanced middle position between greige and a mother-of-pearl-like shimmering pearl.

Which slab formats and thicknesses does Caesarstone offer?

Standard format 306 × 144 cm and jumbo format 327 × 162 cm, in thicknesses of 2 and 3 cm. Individual lines are also available in a thinner thickness (1.2 cm and 0.6 cm “Slim”) for lightweight wall claddings and furniture fronts.

What does the Caesarstone Mineral line mean, and does it affect 4130 Clamshell?

In spring 2024 Caesarstone introduced a new material generation with the “Mineral” line, in which a large proportion of the crystalline quartz has been replaced by other mineral aggregates – as a response to the international discourse on the risk of silicosis during fabrication. The selection documented here, 4130 Clamshell, belongs to the classic quartz mixture; a Mineral variant can be checked on request, if available.

Is Clamshell suitable for kitchen worktops?

Yes, that is its core domain. Engineered quartz is more acid-resistant and more scratch-resistant than natural marble and marble agglomerates. Even so, the following applies: use chopping boards and trivets for hot pans, because the polyester resin can react sensitively to point loads.

Which cleaners may I use?

Warm water, neutral to slightly alkaline stone care products, mild all-purpose cleaners and special Caesarstone care products are permitted. Concentrated acids, concrete and rust removers, paint strippers, oven cleaners and strong solvents such as acetone, petrol or thinners are off limits. Abrasive pads should be avoided.

What warranty does Caesarstone offer?

In the residential sector Caesarstone grants a lifetime warranty (“Caesarstone Forever”) against material and manufacturing defects, subject to fabrication and care to standard. The warranty is handled through authorised specialist firms; ROSSITTIS assists with the documentation. External surfaces and fully sunlit interior areas are expressly excluded.

What does Caesarstone® Quarz 4130 Clamshell cost?

The price depends on the format, thickness, surface finish and fabrication — there is no serious flat rate per square metre. Business customers see prices once their B2B account is activated; private customers receive a complete quote through a fabricator near them.