About the stone
Shells in the stone
A lighter patch up to five centimetres long on a face of Plano is not a stain but the shell of a rudist, the bivalve that built reefs along this coast when it was shallow sea. The stone is 98.27 % calcite, so almost the whole face is one mineral, with no softer veins to wear at a different rate.
Quality report, CEMTRA 7/agk/06
About the stone
Why Dolit goes on the promenade
Dolit takes up a fifth of a per cent of water, Plano a whole per cent, and under Böhme they wear at 17.1 against 21.8 cm³ per 50 cm². On a facade that means nothing. On a surface walked all year, washed, salted and frozen, it means everything: less water in the stone is less ice to split it.
Plano: CEMTRA 7/agk/06. Dolit: owner's figures.