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Pietra Grey

Product overview

Pietra Grey

Naturalness gets enhanced by a touch of luxury, uniqueness and versatility, giving life to surfaces suitable for a wide range of applications. Always offering a captivating balance between timeless elegance and contemporary sensitivity.

Pietra Grey  is a marble mostly sourced from Iran, but also extracted in Italy and China. Its dark background ranges from anthracite grey to dove grey and is embellished by delicate white veins, greatly varying in both width and density.

Our interpretation led to refine its background to obtain more neutral tones and intensity, making a versatile marble for any combination. We also enriched it with nuances and fine details, to avoid a “flat” effect. In addition, we worked on the more visible veins to establish the direction of the project, and we harmonized the thinner ones, to accompany the movement freely, adding dynamism and depth. Finally, integrating crystals within the main veins, usually totally white, we added further distinctive elements.

The result is a proposal that, while respecting the sober elegance of the natural marble, offers more visual harmony and an elegant dynamism, through a wealth of extraordinary details.

Faces

Size: 120*240 cm

Surfaces

We offer the broadest range of surfaces.
Pietra Grey is available in:
  • Spazzolato
  • Lappato Matt
  • Full Lappato
  • Naturale
  • Soft Naturale
Discover more
Full lappato
Lappato matt
Soft Naturale
Naturale
Spazzolato
Rigato
Texture
Pettinato
Texture
Bocciardato
Texture
  • Full lappato
  • Lappato matt
  • Soft Naturale
  • Naturale
  • Spazzolato
  • Rigato
    Texture
  • Pettinato
    Texture
  • Bocciardato
    Texture

Sizes

120x240cm
80x160cm
120x120cm
60x120cm

Spazzolato surface is available in 120X240 cm and 60X120 cm.

Thickness

9 mm

Specifications

DIMENSIONS AND SURFACE QUALITY
Technical feature Standard method ISO Nexion values Requirements
SIZE < 1200 mm SIZE ≥ 1200 mm
% mm % mm
Width ISO 10545 - 2 ± 0,1 ± 0,8 ± 0,1 ± 1 ± 0,3%
Length ± 0,1 ± 0,8 ± 0,1 ± 1,2 ± 0,3%
Thickness ± 4 ± 0,5 ± 4 ± 0,5 ± 5,0%
Straightness of Side ± 0,1 ± 0,8 ± 0,1 ± 1 ± 0,3%
Rectangularity ± 0,1 ± 1,3 ± 0,1 ± 1,5 ± 0,3%
Surface Flatness ± 0,1 ± 1,8 ± 0,2 ± 3 ± 0,4%
Surface Quality 95% A minimum of 95% of the tiles are to
be free from visible defects which can
impair the appearance of a major area
of tiles
PHYSICAL PROPERTIES
Technical feature Standard method ISO Nexion values Requirements
Full Lappato/ Lappato Matt Soft Naturale Naturale
Water Absorption ISO 10545 - 3 Avg. ≤ 0,08%,
Individual 0,2%		 Avg. ≤ 0,08%,
Individual 0,2%		 Avg. ≤ 0,08%,
Individual 0,2%		 ≤ 0,5%,
Individual 0,6%
Modulus of Rupture ISO 10545 - 4 Min. 42 N/mm² Min. 42 N/mm² Min. 42 N/mm² Min. 35 N/mm²,
Individual Min. 32 N/mm²
Breaking Strength ISO 10545 - 4 Min. 1800 N Min. 1800 N Min. 1800 N Not less than 1300 N
Moisture Expansion ISO 10545 - 10 0,02 mm/m 0,02 mm/m 0,02 mm/m -
Surface abrasion ISO 10545-7 CLASS III CLASS IV CLASS IV Minimum Class - II Report abrasion class and cycles passed
Mohs Hardness of surface NA 4 6 7
Coefficient of linear thermal
expansion from ambient
temperature to 100 °C		 ISO 10545 - 8 6x10⁻⁶ K⁻¹ max 6x10⁻⁶ K⁻¹ max 6x10⁻⁶ K⁻¹ max As declared by the Manufacturer
Thermal Shock Resistance ISO 10545 - 9 No damage No damage No damage
Crazing Resistance:
glazed tiles		 ISO 10545 - 11 No damage for
Min. 10 Cycles		 No damage for
Min. 10 Cycles		 No damage for
Min. 10 Cycles		 Required
Bulk Density ISO 10545 - 3 2,2 g/cc 2,2 g/cc 2,2 g/cc 2,2 g/cc
Impact Resistance ISO 10545 - 5 0,55 0,55 0,55 As declared by the Manufacturer
Frost Resistance ISO 10545 - 12 No change No change No change
Small colour differences ISO 10545 - 16 No change No change No change Plain coloured tiles only where required
GL: ∆E < 0,75
UGL: ∆E < 1,0
Small colour differences DIN 51130 - R-09 R-10 As declared by the Manufacturer
CHEMICAL PROPERTIES
Technical feature Standard method ISO Nexion values Requirements
Resistance to staining ISO 10545 - 14 Class 4 Minimum Class 3
Resistance to household
chemicals and swimming pool
salts		 ISO 10545 - 13 Minimum A Minimum B
Resistance to acids & alkalis Minimum B As declared by the Manufacturer

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