Characteristics

SprimontBlue® is a very high quality blue stone. Also known as «petit granit», it is characterised by the presence of a great many fossil remains, cemented together by a microcrystalline gangue containing finely divided carbon. When the stone is freshly broken, the fossils produce a sparkling effect through the action of the light on the facets. The crinoids, corals and shells stand out pale against a dark background, which varies from light grey to black, through a range of bluish shades, according to the finish. The stone becomes lighter with exposure to harsh weather conditions, through the surface washing of the interwoven carbon .

Mineralogical composition
Calcite 96 %, traces of dolomite, quartz and pyrite
Attributes
Apparent density	2687 Kg/m3
Porosity	0,28 % vol
Velocity of sound	5527 m/s
Performance
Compressive strength	157,9N/mm2
Flexural strength	16,7N/mm2
Static modulus of elasticity	86,9 GPa
Wear behaviour	2,87mn/1000 m
Frost susceptibility	0
Thermal transmission coefficient	2,9W/mK
Thermal expansion coefficient	0,00046 mm/mK
Sensitivity to atmospheric pollutants	0