In2stone
Call Us — 023 9238 1360
Calacatta Portoro Marble

Marble

Calacatta Portoro

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

Full Service — Installation

Our marble 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 marble to your supplied template, or supply the stone directly as-is — anywhere in the UK . Learn more .

The Stone

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

From Italy's Ligurian coast, Calacatta Portoro reveals a deep black canvas swept with brilliant white and vivid golden-amber, a truly cosmic display.

Calacatta Portoro is a strikingly dramatic marble, presenting a deep, lustrous black base that immediately captures the eye. Across this intense backdrop, bold, sweeping bands of brilliant white calcite surge, complemented by vivid golden-amber veining. This extraordinary interplay creates a breathtaking, high-contrast composition across its polished surface, evoking a cosmic, nocturnal landscape of exceptional visual power. Its rare, jewel-like beauty and dramatic contrast make Calacatta Portoro one of the most spectacular choices for ultra-luxury worktops, transforming any space into a masterpiece.

Quarried from the renowned region of La Spezia in Liguria, Italy, Calacatta Portoro is a testament to the earth's powerful geological processes. As a metamorphic rock, it began its life as limestone, undergoing immense heat and pressure over millennia. These conditions caused the calcite crystals to recrystallize, while impurities like graphite contributed to its profound black colour, and other accessory minerals formed the brilliant white and golden-amber veins that make this stone so distinctive. We are passionate about bringing such unique geological artistry directly to your home.

When we recommend Calacatta Portoro for kitchen worktops, bathroom vanities, or dramatic splashbacks, we're inviting you to embrace a level of luxury that only natural marble can provide. Its exceptional aesthetic makes it an ideal choice for a focal point. Like all marbles, it requires thoughtful care; we advise regular sealing to protect its porous surface and careful attention around acidic substances to prevent etching. Whether you choose the rich depth of its polished finish or the subtle elegance of a honed surface, our craftsmen will hand-template and meticulously install your Calacatta Portoro, ensuring every join and edge reflects our dedication to quality and lasting beauty.

Performance

How This Stone Performs

Hardness

2 out of 5

Stain Resistance

2 out of 5

UV Resistance

4 out of 5

Heat Resistance

4 out of 5

Scratch Resistance

2 out of 5

Interested in Calacatta Portoro?

Love this stone?

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

Calacatta Portoro Marble slab

Frequently Asked

Questions About Calacatta Portoro

What gives Calacatta Portoro marble its unique visual appeal?
Calacatta Portoro stands out with its deep, lustrous black base, dramatically contrasted by bold, sweeping bands of brilliant white calcite and vivid golden-amber veining. This high-contrast composition on its polished surface creates a truly striking and unique look, often compared to a cosmic, nocturnal landscape.
What design styles or colour schemes work best with Calacatta Portoro?
With its striking black, white, and gold palette, Calacatta Portoro is ideal for ultra-luxury and high-impact designs. It pairs beautifully with modern minimalist aesthetics, opulent traditional settings, or contemporary spaces looking for a bold statement piece. Metallic accents, particularly gold or brass, complement its vivid golden veining stunningly.
How durable is Calacatta Portoro marble, and what special care does it require?
As a natural marble, Calacatta Portoro has a Mohs hardness of 3-5, making it softer than granite or quartzite, so it can be susceptible to scratches. It is also porous and highly sensitive to acids, which can etch its surface. We recommend regular professional sealing, prompt cleanup of spills, and using chopping boards and trivets to protect your worktops, ensuring its beauty endures.
Where is Calacatta Portoro marble sourced from?
Calacatta Portoro is a rare and prestigious marble quarried exclusively from the region of La Spezia in Liguria, Italy. This specific geological environment contributes to its distinctive deep black base and vibrant veining, making it a highly sought-after material for luxury projects worldwide.
How does Calacatta Portoro compare to other popular black or dramatic marbles?
Calacatta Portoro is distinguished by its intense jet-black base combined with exceptionally brilliant white calcite and vivid golden-amber veining, setting it apart from other dramatic marbles. Its 'cosmic, nocturnal landscape' appearance makes it a premium, jewel-like choice that offers a level of visual power and luxury that few other stones can match, often commanding a higher price point due to its rarity and unique aesthetic.
★★★★★
"Perfect. 1) Ian. What a nice chap. Very helpful, friendly, knowledgeable. Got me the marble I wanted. 2) Scott came to template. Clearly attentive to detail, accurate work; it's a perfect fit. 3) Kev and Gav came to fit. Very accommodating. Worked cheerfully around obstacles I had thrown in their path. Efficient, and respected my just cleaned new kitchen. All round blooming marvellous. I got exactly what I wanted. ( these guys listen to their customer) Look no further. Engage In 2 Stone!"
— Dawn GalleryGoogle 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