Marble

Appearance: uniform plain grey-blue with neither veins nor swirls.
Source: Italy.

White P  Marble – geological period: Jurassic (195-140 million years).
Appearance: uniform, compact, saccharoid structure, milky-white, sky-blue  in colour, without veins.
Source: Italy.

Calacatta Marble – geological period: Jurassic (195-140 million years). Appearance: one of the most sought-after Apuane marbles pure white in colour with thin veins running obliquely across it in different shades of grey, tending  at times towards bright beige with shades of green, violet or pink.
Source: Italy.

Cipollino Marble – geological period: Cretaceous (140-65 million years).
Appearance: white with parallel stripes in more or less accentuated waves of variable widths and colours ranging for dark to light green.
Source: Italy.

Black Belgian Marble – as opposed to other marbles it is extracted from mines and not quarries and in medium sized blocks.
Appearance: pitch black. It may have tiny grey marks.
Source: Belgium.