INDEPENDENT TESTING
Stone Testing Data
All MDM marble, onyx and travertine varieties are independently tested against ASTM international standards. Minimum certified specifications and observed test values are published below.
ALL STONE VARIETIES
Minimum certified specifications
All MDM marble, onyx and travertine varieties meet or exceed the following minimum thresholds, verified against International Standard ISO 13006.
| Test | Standard | ISO 13006 minimum | MDM specification |
|---|---|---|---|
| Water absorption | ASTM C-97 | < 0.5% | < 0.4% polished < 0.10% unpolished |
| Modulus of rupture | ASTM C-535 | ≥ 35 N/mm² | ≥ 40 N/mm² |
| Breaking strength | ASTM C-170 | ≥ 1,300 N | ≥ 1,600 N |
| Surface abrasion resistance | ASTM C-880 | PEI Class 2–5 | PEI Class 2–5 |
| Resistance to thermal shock | ASTM C-97 | No visible defect | Pass |
| Frost resistance | ASTM C-97 | No visible damage | Pass |
| Linear thermal expansion | — | No visible defect | Pass |
UNIFORM ACROSS ALL VARIETIES
Observed test values
The following values are recorded consistently across all stone varieties in the current catalogue.
Water Absorption
0.14%
ASTM C-97
Modulus of Rupture
8,038
ASTM C-535
Breaking Strength
7,628 N
ASTM C-170
Surface Abrasion
53.2
ASTM C-880
Thermal Expansion
1,074
coefficient
Thermal Shock
No defect
ASTM C-97
Frost Resistance
No damage
ASTM C-97
Note on shade variation: Shade variation is a natural characteristic of natural stone. Differences in colour, veining, and pattern may occur across slabs or batches. We recommend comparing slabs before installation to ensure consistency or achieve the desired effect.
REQUEST DATA
Full Technical Data 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.