Negro marquina is a compact and fine grained black rock quarried and manufactured in spain. This marble is a recrystallized reef chalk with some calcite veins, on which some fossil remains can be seen. The black marquina can range form pitch black to black with plenty of white veins or fossil shells Negro marquina marble is produced in slabs 2 & 3 cm for transformation in stairs, cut to size pieces.. And in standard sizes 60x60x2 cm (less used), 60x40x2 cm, 60x30x2 cm, 40x40x2 cm, 40x30x2 cm. In other thicknesses you can find tiles 30, 5x30, 5x1 cm (with bevel) for bathroom cladding -