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It depends on where you are. Orders processed here will take 5-7 business days to arrive. Overseas deliveries can take anywhere from 7-16 days. Delivery details will be provided in your confirmation email.

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Stratum Portoro porcelain coordinating faces F1, F2 and F3 shown as full slabs in a dark studio setting

Close-up of Stratum Portoro F1 in Polished finish with copper-gold and silver-gray veining on a black field

Close-up of Stratum Portoro F2 in Silk finish showing a satin low sheen and fine metallic veining

Contemporary kitchen with Stratum Portoro Polished porcelain island, countertops and full-height backsplash

Luxury bathroom with Stratum Portoro Silk porcelain shower walls, vanity top and backsplash

Living room fireplace feature wall clad in coordinating Stratum Portoro porcelain faces

Covered outdoor kitchen with Stratum Portoro Silk porcelain worktops and protected backsplash

Stratum Portoro Porcelain Slab

Specification	Details
Material	Porcelain slab
Finish	Polished \| Silk
Thickness	12 mm
Slab Size	126" x 63" (1600 x 3200 mm)

A deep black porcelain layered with copper-gold veining, fine white and silver-gray accents, and subtle mineral depth—dramatic, refined and available in Polished and Silk finishes.

Stratum Portoro brings dramatic mineral depth to large-format porcelain. Its near-black field is layered with subtle charcoal movement, crossed by slender copper and bronze-gold veins, and sharpened by occasional white and silver-gray lines. The result is bold yet controlled: a dark architectural surface with warmth, dimension and a refined metallic character.

The generous 126 x 63 inch format lets Stratum Portoro's long linear movement travel across broad installations with fewer visual interruptions, while the 12 mm profile supports clean architectural detailing. Three coordinating faces—F1, F2 and F3—provide natural variation for larger layouts. Review the actual faces before fabrication to plan vein direction, cuts and seams; the faces are coordinating designs and should not be assumed to form a mirrored bookmatch.

Stratum Portoro is stocked in both Polished and Silk finishes. Polished introduces controlled reflection and heightens the contrast of its copper-gold and silver-gray lines, while Silk offers a smooth satin character with softer, low-sheen depth. Both options suit kitchen countertops and islands, full-height backsplashes, bathroom walls and vanities, shower surrounds, fireplace surrounds, feature walls and refined residential or commercial interiors.

Specification	Details
Finish Options	Polished \| Silk
Faces	Three coordinating faces: F1, F2 and F3

Specification	Detail
Material	Porcelain Slab
Slab Size	126" x 63" (1600 x 3200 mm)
Thickness	12 mm
Finishes	Polished and Silk
Faces	Three coordinating faces: F1, F2 and F3
Availability	Polished and Silk finishes stocked; check current inventory

Product Description

Available Options

Specification	Details
Finish Options	Polished \| Silk
Faces	Three coordinating faces: F1, F2 and F3

Specifications

Specification	Detail
Material	Porcelain Slab
Slab Size	126" x 63" (1600 x 3200 mm)
Thickness	12 mm
Finishes	Polished and Silk
Faces	Three coordinating faces: F1, F2 and F3
Availability	Polished and Silk finishes stocked; check current inventory

Applications

kitchen countertops.
islands
full-height backsplashes.
bathroom vanity tops.
wall panels.
shower surrounds.
fireplace surrounds.
architectural feature walls.
residential and commercial interior wall cladding.
furniture surfaces.
custom millwork applications.
and flooring where the selected finish and installation system are appropriate.

Why Choose This Material

deep near-black porcelain with warm copper and bronze-gold veining.
crisp white and silver-gray accents.
three coordinating faces.
a large 126" x 63" format.
and a choice of Polished or Silk finishes.

Modern bathroom featuring Calacatta Eterna Quartz vanity countertop and shower walls with soft beige veining

See Your Surface in Person

Visit the Kaya Surfaces showroom to view full slabs in person, compare colors, patterns, and natural variations, and find the perfect surface for your project. Homeowners are welcome to work with their own fabricator or ask our team for a trusted fabricator recommendation.

Bring Your Own Fabricator
Ask for a Fabricator Recommendation

Visit Our Showroom

Frequently Asked Questions

What is the difference between the Polished and Silk finishes?

The Polished finish has a glossy, reflective surface that emphasizes the color and veining. The Silk finish offers a softer, lower-sheen appearance for a more subtle and contemporary look.

What are the F1, F2 and F3 faces?

F1, F2 and F3 are three coordinating faces of the same design. They provide visual variation and give designers and fabricators more flexibility when arranging multiple slabs across larger installations.

Are the F1, F2 and F3 faces bookmatched?

No. The three faces are coordinating designs and should not be assumed to form a mirrored bookmatch. True bookmatched porcelain uses specifically designed opposing graphics to create a mirrored effect.

Where can these porcelain slabs be used?

Depending on the project's technical requirements, large-format porcelain can be used for countertops, kitchen islands, backsplashes, bathroom vanities, shower walls, feature walls and other interior surfaces.

Can these porcelain slabs be used for flooring?

Flooring suitability should be confirmed for the specific slab thickness, finish, substrate and installation system. Large-format porcelain can be used for floors in appropriate configurations, but not every slab or installation method is automatically floor-rated.

How should I clean and care for the porcelain surface?

For routine care, remove loose dirt and wipe the surface with a soft cloth or non-abrasive sponge using a cleaner suitable for porcelain. Avoid abrasive pads that could affect the factory finish, and follow the product-specific care recommendations for the selected Polished or Silk surface.

What should be considered before fabrication and seam planning?

Review the actual F1, F2 and F3 faces before cutting and determine the vein direction, slab orientation, cut locations, seams and adjoining pieces in advance. Careful dry layout is especially important with directional veining and large-format installations.

Stratum Portoro Porcelain Slab