Montana Grey Royal Stone Collection
Montana Grey is a marble-effect porcelain tile and large format slab from our Royal Stone Collection. Polished (6mm) — interior floors in living areas, hallways and kitchens; interior walls; worktops, vanity tops and furniture. Honed (6mm) — interior floors in living areas, hallways and kitchens; interior walls; worktops, vanity tops and furniture. See where each finish can be usedSee where Polished can be usedSee where Honed can be used. Order a free sample below.
Montana Grey Sizes & Finishes
Showing only. Show all finishes
All sizes are rectified. Shade variation: V3.
| Finish | Size (mm) | Thickness | Slip rating | Variation | Rectified | Weight / m² |
|---|---|---|---|---|---|---|
| Polished | 1500 × 3000 | 6mm | – | V3 | Yes | 14.2 kg |
| 1500 × 1500 | 6mm | – | V3 | Yes | 14.2 kg | |
| 750 × 1500 | 6mm | – | V3 | Yes | 14 kg | |
| 750 × 750 | 6mm | – | V3 | Yes | 14.1 kg | |
| Honed | 1500 × 3000 | 6mm | – | V3 | Yes | 14.2 kg |
| 1500 × 1500 | 6mm | – | V3 | Yes | 14.2 kg | |
| 750 × 1500 | 6mm | – | V3 | Yes | 14 kg | |
| 750 × 750 | 6mm | – | V3 | Yes | 14.1 kg |
Specification clause
Copy the clause for Montana Grey into your specification or schedule.
Montana Grey – Polished
- Product
- Royal Stone Collection, Montana Grey, Polished finish
- Material
- Marble-effect porcelain tiles and slabs
- Supplier
- Porcelain Stones Ltd, www.porcelain-tiles.co.uk
- Sizes
- 1500 × 3000 × 6 mm (14.2 kg/m², ref GF1232); 1500 × 1500 × 6 mm (14.2 kg/m², ref GF1233); 750 × 1500 × 6 mm (14.0 kg/m², ref GF1234); 750 × 750 × 6 mm (14.1 kg/m², ref GF1237)
- Edges
- Rectified
- Shade variation
- V3
- Water absorption
- 0.03% - 0.06% (ISO 10545-3)
- Frost resistance
- Conforms (ISO 10545-12)
- Abrasion resistance
- 140 Mm³ (ISO 10545-6)
- Suggested grout
- Mapei – 103 Moon White tile grout
- Recommended uses
- Interior floors: Living areas & hallways, Kitchens. Interior walls: Feature walls, Full-height wall cladding, Kitchen splashbacks, Shower walls. Large-format surfaces: Seamless wall cladding, Seamless floors, Kitchen worktops & islands, Vanity tops & basins, Tables & furniture, Fireplace & bath surrounds
- Certification
- GREENGUARD, NSF
- Samples
- Free samples available
- Product page
- https://www.porcelain-tiles.co.uk/tile/montana-grey-polished/
Colour of grout recommended may be subjective.
Montana Grey – Honed
- Product
- Royal Stone Collection, Montana Grey, Honed finish
- Material
- Marble-effect porcelain tiles and slabs
- Supplier
- Porcelain Stones Ltd, www.porcelain-tiles.co.uk
- Sizes
- 1500 × 3000 × 6 mm (14.2 kg/m², ref GF1243); 1500 × 1500 × 6 mm (14.2 kg/m², ref GF1239); 750 × 1500 × 6 mm (14.0 kg/m², ref GF1242); 750 × 750 × 6 mm (14.1 kg/m², ref GF1245)
- Edges
- Rectified
- Shade variation
- V3
- Water absorption
- 0.03% - 0.06% (ISO 10545-3)
- Frost resistance
- Conforms (ISO 10545-12)
- Abrasion resistance
- 140 Mm³ (ISO 10545-6)
- Suggested grout
- Mapei – 103 Moon White tile grout
- Recommended uses
- Interior floors: Living areas & hallways, Kitchens. Interior walls: Feature walls, Full-height wall cladding, Kitchen splashbacks, Shower walls. Large-format surfaces: Seamless wall cladding, Seamless floors, Kitchen worktops & islands, Vanity tops & basins, Tables & furniture, Fireplace & bath surrounds
- Certification
- GREENGUARD, NSF
- Samples
- Free samples available
- Product page
- https://www.porcelain-tiles.co.uk/tile/montana-grey-polished/
Colour of grout recommended may be subjective.
Specifying Montana Grey for a project? Our team can advise on finishes, formats and quantities.
Montana Grey Applications
Where each finish of Montana Grey can be specified, based on its slip rating, thickness and format.
| Application | Polished | Honed |
|---|---|---|
| Interior floors | ||
| Living areas & hallways | Suitable | Suitable |
| Kitchens | Suitable | Suitable |
| Bathrooms | Not recommended | Not recommended |
| Showers & wet areas | Not recommended | Not recommended |
| High-traffic & commercial | Not recommended | Not recommended |
| Interior walls | ||
| Feature walls | Suitable | Suitable |
| Full-height wall cladding | Suitable | Suitable |
| Kitchen splashbacks | Suitable | Suitable |
| Shower walls | Suitable | Suitable |
| Large-format surfaces | ||
| Seamless wall cladding | Suitable | Suitable |
| Seamless floors | Suitable | Suitable |
| Kitchen worktops & islands | Suitable | Suitable |
| Vanity tops & basins | Suitable | Suitable |
| Tables & furniture | Suitable | Suitable |
| Fireplace & bath surrounds | Suitable | Suitable |
Guidance based on DIN 51130 slip ratings, thickness and format. Always confirm project-specific requirements, particularly for commercial and public spaces.
Montana Grey Product Story
Montana Grey comes in Polished and Honed for interior walls and floors in living areas and kitchens. Slabs up to 1500 × 3000mm extend it to seamless wall cladding, seamless floors, worktops and islands, vanity tops and basins, tables and furniture, and fireplace and bath surrounds. Every size is rectified for narrow, consistent joints, in a 6mm thickness. Montana Grey has moderate tonal variation (V3) that reads as natural movement rather than a printed surface.
Montana Grey Gallery

Royal Stone Montana Grey porcelain tiles – photo 1 
Royal Stone Montana Grey porcelain tiles – photo 2 
Royal Stone Montana Grey porcelain tiles – photo 3 
Royal Stone Montana Grey porcelain tiles – photo 4 
Royal Stone Montana Grey porcelain tiles – photo 5 
Royal Stone Montana Grey porcelain tiles – photo 6 
Royal Stone Montana Grey porcelain tiles – photo 7 
Royal Stone Montana Grey porcelain tile swatch
Montana Grey Graphical Faces
Montana Grey is supplied with a number of distinct graphical faces. Below are examples of 5 of these graphical faces when supplied in 3000 x 1500 mm formats. Click on any swatch for a closer look.
Montana Grey Create Bespoke Products
Porcelain slabs were never meant to stop at floors and walls. Large-format porcelain, made into tables, vanities and countertops in our UK workshops.
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We can supply your vanity and basin in Montana Grey.
Made to measure in-house: curved fronts, integrated basins and storage, with a consistent finish from a single bathroom to a whole hotel.
Shown in another colour.
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Fine Dining Tables
Bespoke dining tables with hard-wearing porcelain tops: heat, stain and scratch resistant, and low maintenance. Choose from four collections — Monarch, Luna, Vanguard and Phantom — or design your own. Needs a 12mm+ top. Not available in Montana Grey.
Shown in another colour.
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Premium Kitchen Countertops
We template, make and install, with no third parties involved: 12mm and 20mm porcelain for worktops, waterfall islands and splashbacks. Needs a 12mm+ top. Not available in Montana Grey. See 12mm tops →
Shown in another colour.
Specifying Montana Grey
Quantity & Weight Estimator
Work out how many tiles you need for each area, and the total weight for delivery, handling and structural checks.
Similar Colours
Other grey marble effect porcelain tiles from different collections, ranked by how closely they match Montana Grey on finish, slip rating, thickness and format.
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Silver Onyx
Onyx Sense Collection
Up to 1200 × 2800 | 6, 9mm
Shared: Polished, Honed | 6mm | V3
-
Aubisque
Grandi Marmi Collection
Up to 1200 × 2800 | 6, 9mm | R11, R9
Shared: Polished, Honed | 6mm
-
Champagne
Via Taj Mahal Collection
Up to 1200 × 2800 | 6, 9mm | R11, R9
Shared: Polished, Honed | 6mm
-
Tuscan Grey
Majestic Collection
Up to 1200 × 2800 | 6, 9mm | R10
Shared: Polished, Honed | 6mm
-
Klimt
Via Onice Collection
Up to 1200 × 2780 | 6, 9.5mm
Shared: Polished | 6mm | V3
-
Moon Grey
Via Marmi Collection
Up to 1200 × 2780 | 6, 9.5mm | R10
Shared: Polished | 6mm | V3
-
Persa Grigio
Gem Stone Collection
Up to 1500 × 3000 | 6mm
Shared: Polished | 6mm | V3
-
Smoke Opal
Gem Stone Collection
Up to 1500 × 3000 | 6mm
Shared: Polished | 6mm | V3
Montana Grey has been categorised as a grey marble effect porcelain tile.
Royal Stone Collection
The Royal Stone Collection is available in the following colours:
Technical Specification
Technical Data
| Characteristic | Test standard | Requirement | Result |
|---|---|---|---|
| Length and Width | ISO 10545-2 | ± 0.6% Max | ± 0.1% |
| Thickness | ISO 10545-2 | ± 5% Max | ± 5% |
| Linearity | ISO 10545-2 | ± 0.5% Max | ± 0.1% |
| Wedging | ISO 10545-2 | ± 0.5% Max | ± 0.1% |
| Warpage | ISO 10545-2 | ± 0.5% Max | ± 0.2% |
| Water Absorption | ISO 10545-3 | ≤ 0.5 % | 0.03% - 0.06% |
| Deep Abrasion Resistance | ISO 10545-6 | ≤ 175 Mm³ | 140 Mm³ |
| Coefficient of Linear Thermal Expansion | ISO 10545-8 | ≤ 9x10-6 °C-1 | 6.5x10-6 °C-1 |
| Resistance to Thermal Shocks | ISO 10545-9 | Testing Method Available | Resistant |
| Frost Resistance | ISO 10545-12 | Must not produce noticeable alteration to surface | Conforms |
| Chemical Resistance | ISO 10545-13 | Testing Method Available | On Request |
| Stain Resistance | ISO 10545-14 | Testing Method Available | Resistant To Stain |
| Colour Resistance to Light | DIN 51094 | Must not produce noticeable colour variation | Conforms |
Shade Variation
Royal Stone Montana Grey is rated .

Shade variation describes how much colour, tone and pattern differ from tile to tile in the same batch, from V1 (uniform appearance) to V4 (substantial variation). Lay out tiles from several boxes before fixing to see the full range.
Download PDF Catalogue
You can download the Royal Stone PDF catalogue here, along with our Now Imagine catalogues for bespoke dining tables, vanities and kitchen countertops. You can call us on 020 3141 3337 or email enquiry@porcelaintiles.co.uk for more information about our Italian porcelain tiles.
Technical sheets include the product details, technical specification and environmental certification for each finish of Montana Grey.
Samples
To order free Royal Stone Montana Grey samples, use the Order free sample button.
To review your items or to complete your order simply click on the white tile icon in the top right-hand corner on any page of our website. You will then have the opportunity to review, edit or complete your order. You can also complete your order by clicking on the button below.
Prefer to see it in person? Visit our North or South London showroom.
View Montana Grey in our showroom
Tile samples are provided in 10 x 20 cm format.
Environmentally Certified
All our porcelain surfaces are manufactured using sustainable processes that minimise the impact on the environment, conserving both energy & natural resources.
All products are produced without the use of any harmful or radioactive materials, are free from pollutant emissions and will not affect air quality. All packing material is produced with recycled material. Wherever possible, heat generated as a by-product of the manufacturing process is used for electricity generation, making factories energy self-sufficient. All waste material that is associated with the supply of the tile surface is fully recyclable.
All products are manufactured using materials from renewable sources. They have a reduced environmental impact throughout their lifespan and no toxic, harmful or polluting substances are used for their composition and production. The materials do not release toxic, harmful or polluting substances.
Royal Stone meets the highest standards of quality and environmental regulations and conforms to the following certifications:
NSF®
NSF® has facilitated the development of more than 75 standards and protocols for sanitary food equipment, and has certified thousands of products as safe to use in restaurant and commercial kitchen settings. NSF® food equipment standards include requirements for material safety, design, construction and product performance. The products conform to the requirements of NSF/ANSI Standard 51 – Food Equipment Materials. NSF/ANSI 51 establishes minimum public health and sanitation requirements for materials and finishes used in the manufacture of commercial foodservice equipment.
GREENGUARD
GREENGUARD Certification ensures that a product meets stringent standards for minimal emissions of volatile organic compounds (VOCs) into indoor air. This program provides assurance that products designed for indoor use adhere to strict chemical emissions limits, fostering the creation of healthier interiors. Manufacturers with GREENGUARD Certification gain credibility for their sustainability claims, supported by empirical technical data from an unbiased third-party organisation. The GREENGUARD Certification Program instils confidence by ensuring that indoor products meet strict chemical emissions limits, contributing to the creation of healthier interior spaces. This empowers manufacturers to produce and customers to identify products with low chemical emissions, thereby supporting air quality and environmental well-being.
For more information please read our article on Environmental Impact.












