Grey - Slate
Quarry Location: Rahinkkalanvaar, Puolanka, Kotila, Oulu
Water Absorption: 0.23 By weight %
Density: 2860 kg/m3
Flexural Strength: 24 MPa
Compressive Strength: 69 MPa
Recommended Usage: Building stone, roofing, countertops, sinks, monuments, pool coping, sills, ornamental stone, interi
Finishing Surface: Honed, Aged, Polished, Sawn Cut, Sanded, Rockfaced, Sandblasted, Bushhammered, Tumbled
Additional Names: Puolanka Slate, Lappia Silver Slate,Lappia Silver
A silver-coloured, folded mica schist from Puolanka.
Schistose and muscovite bearing layers folded in small scale. Quarried and processed like granite.
Mineralogical composition
Muscovite mica:37%
Biotite mica:18%
Quartz:38%