Korpi Black Granite Slabs, Finland Black Granite

This granite is black gabbro stone which is extracted from the quarry in Korpilahti. Suitable for all indoor and outdoor uses. Amount of extraction: approx. 100 m3 / month.
Technical properties
EN_13755 Water absorption 0.04 %
EN_1936 Apparent density 2990 kg/m3
EN_12372 Flexural strenght 22.1 Mpa
EN_12371 Frost resistance, change of flexural strenght* +0.5 %
EN_1926 Compressive strenght 206 Mpa
EN_14157 Abrasion resistance 15 mm
EN_13364 Breaking load at dowel hole 4000 N
* after 48 cycles
Mineral content
Values according to new EN-12407 standard.
Plagioclase 51.8 Wt %
Clinopyroxene 15.0 Wt %
Orthopyroxene 14.4 Wt %
Amphibole 6.3 Wt %
Biotite 4.3 Wt %
Ilmenite 2.4 Wt %
K-feldspar 1.3 Wt %
Quartz 1.1 Wt %
Chlorite 1.0 Wt %
Accessory minerals 0.4 Wt %