Pietra Grey Sandblasted & Brushed

P3
Slip Rating
V1
Colour Variation
Quality Grade:
MK12-F07P02

Technical Specifications

Porosity
0.33%
ASTM C97
Density
2720kg/m³
ASTM C97
Water Absorption
0.13%
ASTM C97
Compressive Strength
35MPa
ASTM C170
Abrasion Resistance
19mm
EN 14157
Cold Resistance
-20°C
Standard
Heat Resistance
120°C
Standard
Flexural Strength
13MPa
Standard

Project Configuration

Installation & Care

Adhesive

Avoid abrasive brushes

Mild soap solution

About This Material

Pietra Grey Sandblasted and Brushed Marble

Pietra Grey Sandblasted and Brushed is a dark grey natural marble with fine white veins and two different surface finishes applied to the same stone. Sandblasting creates a matte, lightly textured surface, while brushing gives the marble a softer tactile finish with more visible material depth.

This combination is useful in projects that need one consistent marble color across different areas. The sandblasted finish can be considered for floors, stairs and circulation zones, while the brushed finish works well on walls, feature surfaces, fireplace surrounds and other vertical applications.

Pietra Grey Sandblasted and Brushed dark grey marble
Pietra Grey marble with a dark grey background and fine white veining.

Pietra Grey Sandblasted and Brushed – Product Overview

Pietra Grey Sandblasted and Brushed is based on a dense dark grey marble structure. Its visual range moves from deep grey to charcoal, with fine white veins running through the surface. The contrast between the background and the veins is clear but controlled, so the material can work in both compact interiors and larger architectural spaces.

The main design advantage is the ability to use two textures without changing the marble itself. This makes it possible to keep the same color language throughout a project while selecting a different surface treatment according to function. For example, a designer may use sandblasted marble on horizontal surfaces and brushed marble on vertical surfaces.

Because this is natural marble, some variation in background tone, vein movement and mineral markings should be expected. For larger orders, representative samples should be approved before full production.

Sandblasted Finish

In Pietra Grey Sandblasted and Brushed, the sandblasted finish creates a matte surface with a fine granular texture. The treatment reduces shine and changes the way light is reflected from the dark grey marble.

Key Characteristics of Sandblasted Pietra Grey

  • Matte surface with very low reflection
  • Fine and controlled texture
  • More diffuse appearance of the grey background
  • Suitable for architectural areas where a textured surface is preferred
  • Can be considered for floors, stairs, corridors and entrance zones

Sandblasted Pietra Grey is often selected where a glossy surface is not required. The finish gives the marble a more architectural appearance and can make dust, fingerprints and small daily marks less visually dominant than on a highly polished surface.

For walking areas, finish selection should not be based on appearance alone. Traffic level, cleaning method, installation conditions and any project-specific slip-resistance requirements should be checked before final approval. For independent technical information about natural stone testing, see the Natural Stone Institute testing resources.

Pietra Grey sandblasted marble surface texture
Surface texture reference for Pietra Grey marble.

Brushed Finish

The brushed side of Pietra Grey Sandblasted and Brushed has a softer tactile character. Brushing follows the natural structure of the marble and creates a surface that is smoother than a strongly textured finish but still has visible depth.

Key Characteristics of Brushed Pietra Grey

  • Soft tactile surface
  • Low-gloss appearance
  • Natural texture without a rough finish
  • Fine white veins remain visible
  • Well suited to walls and decorative architectural areas

Brushed Pietra Grey is commonly considered for wall cladding, feature walls, fireplace surrounds, reception areas and other vertical surfaces. The brushed texture adds depth to the marble without creating the strong reflection associated with polishing.

It can also make fingerprints and very fine surface marks less noticeable under normal interior lighting. Actual maintenance performance still depends on the project, lighting conditions and cleaning routine.

Sandblasted vs Brushed Pietra Grey

Feature Sandblasted Brushed
Reflection Very low Low
Texture Fine granular Soft tactile
Visual effect More matte and diffuse More depth and material movement
Typical use Floors, stairs, corridors Walls, feature surfaces, fireplaces
Project approval Approve actual texture sample Approve actual texture sample

One of the main strengths of Pietra Grey Sandblasted and Brushed is that both finishes can be used in the same project. This allows designers to create a difference between horizontal and vertical surfaces while keeping the same marble color, vein pattern and overall material identity.

Pietra Grey Sandblasted and Brushed marble grey color and white veins
Dark grey tonal range and fine white vein movement in Pietra Grey marble.

Applications of Pietra Grey Sandblasted and Brushed

Pietra Grey Sandblasted and Brushed can be considered for a range of interior architectural applications. The correct finish should be selected according to whether the stone is used horizontally, vertically or as a decorative feature.

Interior Flooring

Sandblasted Pietra Grey can be considered where a matte and textured marble floor is required. Traffic, abrasion, substrate and cleaning should be reviewed before specification.

Staircases

Sandblasted processing is a practical starting point for steps and circulation areas, subject to tread geometry, installation and project-specific surface requirements.

Wall Cladding

Brushed Pietra Grey works well on wall surfaces where lower reflection and more tactile material character are preferred.

Feature Walls

The dark grey background and fine white veins can create a strong architectural wall without introducing a highly decorative or visually crowded pattern.

Fireplace Surrounds

Brushed marble can create a low-reflection stone frame around fireplace areas. Construction and heat-related detailing should be reviewed by the project team.

Lobbies and Reception Areas

Sandblasted floors and brushed walls can be combined to create a consistent grey marble palette with different textures.

Design Style and Material Matching

The dark neutral color of Pietra Grey Sandblasted and Brushed makes it easy to combine with lighter materials and restrained architectural finishes. The most successful combinations usually keep the surrounding palette simple.

Materials That Pair Well with Pietra Grey

  • White and cream stone: creates a strong but natural contrast.
  • Natural wood: adds warmth against the dark grey marble.
  • Black or graphite metal: extends the grey palette without competing with the veins.
  • Concrete and cement finishes: support a contemporary architectural appearance.
  • Light plaster and neutral paint: keep the stone as the main material element.

The sandblasted finish is useful when the design needs a flatter and more technical visual direction. The brushed finish adds softness and tactile depth. Using both finishes together creates variation without introducing another stone color.

Maintenance of Pietra Grey Sandblasted and Brushed

Pietra Grey Sandblasted and Brushed is a marble product, so cleaning and maintenance should be suitable for natural calcium-based stone. Textured finishes also need cleaning methods that can reach into the surface rather than only wiping the top face.

Basic Care Recommendations

  • Use pH-neutral cleaners intended for natural marble.
  • Avoid strong acidic cleaning products.
  • Remove spills as soon as practical.
  • Test any sealer on a representative sample before full application.
  • Use cleaning tools appropriate for the texture of the surface.
  • For commercial projects, define the maintenance method before material approval.

Sealing requirements depend on the actual stone, finish, use and maintenance program. A project sample should be used when selecting sealers or cleaning products. For independent guidance on marble and natural stone cleaning, review the Natural Stone Institute care and cleaning guide.

Why Choose Pietra Grey Sandblasted and Brushed?

Pietra Grey Sandblasted and Brushed gives architects and buyers a practical way to use one dark grey marble with two different surface characters. The sandblasted finish supports functional and architectural areas, while the brushed finish provides a softer texture for vertical and decorative surfaces.

The main benefit is material continuity. Floors, stairs, walls and feature surfaces can remain within one marble family while texture changes according to the function of each area. This can simplify material coordination and keep the visual language of the project consistent.

Pietra Grey Sandblasted and Brushed – FAQ

What is Pietra Grey Sandblasted and Brushed?

Pietra Grey Sandblasted and Brushed is a dark grey marble offered with two coordinated surface treatments: sandblasted and brushed. Both finishes use the same natural stone but create different textures and levels of reflection.

What is the difference between the two finishes?

Sandblasted Pietra Grey has a matte, fine granular texture and very low reflection. Brushed Pietra Grey has a softer tactile surface with slightly more visual depth.

Which finish is better for flooring?

Sandblasted processing is commonly considered where a more textured marble surface is required. Final suitability should still be checked against traffic, cleaning, installation and any project-specific slip-resistance criteria.

Which finish is better for walls?

The brushed finish is a strong starting point for wall cladding and feature surfaces because it keeps a soft texture while avoiding the strong reflection of polished marble.

Can both finishes be used in one project?

Yes. Sandblasted material can be used on floors and stairs while brushed pieces continue onto walls and decorative surfaces, keeping one consistent Pietra Grey color throughout the project.

How should the material be approved before production?

Approve representative samples showing the accepted grey tone, white vein movement, sandblasted texture and brushed texture. For larger projects, also define dimensions, thickness, finish consistency and acceptable natural variation.

Request Pietra Grey Sandblasted and Brushed

For a Pietra Grey Sandblasted and Brushed project, send the required finish, application, dimensions, thickness, quantity, drawings and delivery destination. Karimi Stone can review the production requirements and material selection for your order.

Contact Karimi Stone for project information

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Reference Catalog

Stone Size Guide

Standard slab, tile, pattern and step sizes to help plan your takeoffs and orders. Dimensions are shown in centimeters unless otherwise stated.

Standard offering ! Tolerance indicated as ±

Slabs

Standard slab supply for project-scale cutting and fabrication.

Standard Slab

Dimensions (cm)
  • (250 × 150) ±20
  • (250 × 150) ±20
Thickness
  • 2 cm
  • 3 cm

Big Slab

Dimensions (cm)
  • (270 × 170) ±20
  • (270 × 170) ±20
Thickness
  • 2 cm
  • 3 cm
Tolerance applies to length and width. Thickness tolerance is available upon request.

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Name(Required)
Product Details
SKU Code
MK12-F07P02
Internal reference
Product Title
Pietra Grey Sandblasted & Brushed
Public name
Brushed leathered natural stone finish Surface Finish 04

Karimi Stone · Finish Guide

Brushed Leathered Finish

A softly textured, low-glare surface created with wire brushes, similar to natural leather under hand, with gentle movement across the stone.

Leather-like touch Low-glare, refined look Subtle texture variation

Soft, leather-like texture

Instead of polishing with hard abrasives, wire brushes move across the stone surface. They ease into softer veins and tiny pores, gently deepening them while polishing harder areas. The result is a lightly uneven, tactile surface that feels soft and natural rather than glossy.

Touch Soft and tactile
Reflection Low-glare and matte
Variation Subtle natural movement
Karimi Stone · Natural Stone Surface Library Brushed Leathered Finish

Slip Rating & Wet Pendulum Guide

A concise overview of P1–P5 slip ratings so you can align each Karimi Stone finish with the right space, moisture level and safety expectation.

OVERVIEW

P1 → P5 safety band
P1 P2 P3 P4 P5
What the Wet Pendulum Test (WPT) tells you
The WPT measures how slippery a surface becomes when wet. Each finish is given a P rating from P1 (higher slip risk) through to P5 (maximum grip). As the number increases, the expected slip resistance also increases.

RATING SCALE SNAPSHOT

From higher slip risk to maximum grip
Each Karimi Stone P icon below is your quick visual code before checking detailed applications.

P1 → P5  Left = smoother | Right = more textured

P1

Dry circulation

Higher slip risk

For dry-only walkways and light traffic areas where water is not expected on the surface.

P2

Light splash

Occasional moisture
Bathrooms, small kitchens and transition areas that see brief, easily managed water.
P3

Everyday wet public

Balanced grip
Entries, amenities, undercover car parks and fresh food retail where wet floors are common.
P4

High exposure

Wet, high traffic
Pool surrounds, communal showers and external ramps under 1:14 where water is constant.
P5

Maximum grip

Highest safety band

Commercial kitchens, covered loading docks and pool ramps or stairs leading into water.

HOW TO READ THIS POPUP

Start with water, movement and consequence
Consider how wet the floor can get, how quickly people move, and how critical a slip could be. Then use the cards below to align each area of your project with a suitable P rating before you select a Karimi Stone finish.

TYPICAL APPLICATIONS

P1 – dry circulation
Higher slip risk when wet

P1
For areas intended to remain dry with controlled walking speeds – such as supermarket aisles, separate shops inside centres or dry lobby and corridor zones.
Retail aisles
Dry-only entries
Light traffic

P2 – light splash
Transitional & semi-wet areas

P2
For spaces where occasional water is expected but quickly managed – like hotel bathrooms, apartment kitchens, laundries and transition zones between wet and dry areas.
Hotel bathrooms
Apartment kitchens
Laundries

P3 – regularly wet public
Balanced everyday grip

P3
Used where wet conditions are common – entries and access ways, toilet facilities in public buildings, undercover car parks and fresh food retail areas.
Public entries
Toilet facilities
Undercover parking

P4 – high exposure
Wet, high traffic environments

P4
Selected for consistently wet and busy areas such as pool surrounds, communal showers, external ramps under 1:14 and service zones behind bars.
Pool surrounds
Communal showers
Light traffic

P5 – maximum grip
Demanding commercial use

P5
For the most demanding applications: commercial kitchens, loading docks under cover, steep external ramps, swimming pool ramps and stairs leading into water.
Commercial kitchens
Loading docks
Pool ramps & stairs
TEST STATUS CODES

Where a P rating is not shown

For the most demanding applications: commercial kitchens, loading docks under cover, steep external ramps, swimming pool ramps and stairs leading into water.

?

N/T

No Wet Pendulum slip testing has yet been performed on this surface finish.

N/A

Wet Pendulum testing is not applicable or cannot be performed for this surface format.

W

WPT

Indicates that the Wet Pendulum Test method has been used to determine the rating.

Always refer to the specific data sheet for each Karimi Stone product to see which of these codes or P ratings apply.

Information disclaimer

This guide is a general summary only and does not constitute legal or compliance advice. Slip resistance requirements vary by project, location and use. Always confirm ratings and regulatory obligations with qualified slip-rating and building-compliance professionals before final specification.

Colour Variation Guide

A premium, visual overview of how colour movement evolves from calm, uniform surfaces to high-impact, expressive finishes.

Variation scale

Choose a variation level
V1 selected
V0
V1
V2
V3
V4
Calm & uniform
Highly varied
Reading the scale
V0 is almost seamless with minimal tone shifts, while V4 is bold and highly expressive. Use this guide to align the surface movement with the mood of your space.
Variation reference cards

Near-Zero Variation – V0

Ultra-consistent tone with almost no visible shift between pieces. Ideal for gallery-like, minimal interiors where the surface should visually disappear.

Soft Variation – V1

Delicate, low-contrast changes gently break up the surface. A refined choice for calm kitchens, ensuites, and open-plan living spaces.

Moderate Variation – V2

Balanced, natural movement with visible differences in tone. Adds character and depth while staying easy to style with cabinetry and textiles.

Expressive Variation – V3

Stronger contrast from piece to piece with noticeable light and dark areas. Best when you want the surface to act as a key design feature.

High-Drama Variation – V4

Pronounced shifts in hue and tone, creating a richly patterned, statement finish. Ideal for feature walls, dramatic floors, or high-impact spaces.
Cut broken natural stone finish Surface Finish 01

Karimi Stone · Finish Guide

Cut Broken Finish

A structured, natural-looking surface with controlled broken grooves that softens reflections and adds depth to façades and feature walls.

Textured, non-polished Natural broken grooves Designed for façades

Soft, leather-like texture

In a cut broken finish, the stone is first sawn into slabs, then the face is worked with machine and hand tools to create controlled grooves and broken ridges. Instead of a flat, polished surface, it produces a matte, non-reflective texture. Light catches the small steps and fractures, adding depth and a handcrafted architectural character.

Reflection Low and diffused
Character Broken and tactile
Visual effect Deep natural shadows
Karimi Stone · Natural Stone Surface Library Cut Broken Finish
Bush hammered natural stone finish Surface Finish 02

Karimi Stone · Finish Guide

Bush Hammered Finish

A highly textured, non-slip surface created by controlled hammer impacts, giving the stone a natural, weathered character for demanding outdoor conditions.

High slip resistance Rugged outdoor texture Visually natural & matte

Deep texture, strong performance

In a bush hammered finish, a head fitted with multiple diamond or carbide points repeatedly strikes the stone surface. These impacts chip tiny craters 1–3 mm deep, breaking up the smooth face into a rugged, non-slip texture. The result is a naturally matte, highly tactile surface that feels solid underfoot and stands up to tough weather and heavy use.

Slip resistance High grip
Surface Rugged and cratered
Best use Outdoor heavy traffic
Karimi Stone · Natural Stone Surface Library Bush Hammered Finish
Brushed and tumbled natural stone finish Surface Finish 03

Karimi Stone · Finish Guide

Brushed

A character-rich surface combining a softly brushed texture with gently worn, rounded edges for an antique yet refined appearance.

Antique, lived-in character Softened edges & corners Textured, low-glare surface

Soft, leather-like texture

The tumbled process softly wears back edges and corners, creating a rounded, timeworn profile with an antique feel. Brushing then moves across the surface with wire brushes, opening the softer areas and polishing the harder minerals. Together, they create a naturally aged, gently textured and visually calm surface with no sharp edges under hand or bare feet.

Edges Softened and rounded
Surface Brushed and low-glare
Character Antique and timeworn
Karimi Stone · Natural Stone Surface Library Brushed Finish

Applications

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