Independent Testing

Stone Testing Data

Our natural stone range has been independently laboratory tested and certified to ISO 13006 and ASTM international standards. Full test data is published below for trade specification.

ISO 13006 Certification

Certified Physical & Mechanical Properties

The table below compares our independently tested results against ISO 13006 minimum thresholds. All testing was carried out by an accredited third-party laboratory. Results apply to the standard marble and onyx range supplied by MarbleSupplier.co.uk.

Test Standard ISO 13006 Threshold Our Result
Water Absorption ASTM C-97 / ISO 10545-3 ≤ 0.5%
0.14% Pass
Modulus of Rupture ASTM C-535 / ISO 10545-4 ≥ 35 N/mm²
55.4 N/mm² Pass
Breaking Strength ASTM C-170 / ISO 10545-4 ≥ 700 N
7,628 N Pass
Resistance to Surface Abrasion ASTM C-880 / ISO 10545-6 PEI ≥ 2
53.2 / PEI 2–5 Pass
Linear Thermal Expansion ISO 10545-8 ≤ 9 × 10⁻⁶ /°C
Compliant Pass
Resistance to Thermal Shock ASTM C-97 / ISO 10545-9 No visible defect
No visible defect Pass
Frost Resistance ASTM C-97 / ISO 10545-12 No visible defect
No visible defect Pass
Observed Test Values

Laboratory Measurements

The values below represent actual laboratory measurements recorded during independent testing. Results reflect the performance characteristics of our standard marble and onyx slabs at 20 mm thickness.

Water Absorption 0.14% ASTM C-97 Well within low-absorption threshold for interior and exterior use
Modulus of Rupture 55.4 N/mm² ASTM C-535 High flexural strength suitable for heavily trafficked installations
Breaking Strength 7,628 N ASTM C-170 Exceeds ISO 13006 threshold by over 10×
Surface Abrasion 53.2 ASTM C-880 / PEI 2–5 Suitable for residential and commercial floor applications
Thermal Expansion 1,074 ISO 10545-8 No visible defect after thermal cycling — compliant
Thermal Shock Pass ASTM C-97 / ISO 10545-9 No visible defect — suitable for underfloor heating installations
Frost Resistance Pass ASTM C-97 / ISO 10545-12 No visible defect — approved for external and wet area use
Note on shade variation: Natural stone is a living material. Colour, veining and surface texture vary between quarry blocks and individual slabs. Test data represents the physical and mechanical properties of the stone and does not imply uniformity of appearance. Our trade team can arrange sample approval prior to order confirmation.
Request Data

Full Technical Data Sheets Available on Request

Technical data sheets for all products in our range are available to approved trade accounts. Contact our team to request documentation for your specification.

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