Marble tiles are formed from metamorphic rock such as limestone, the temperature and pressures of the process transform the crystal structure to produce a hard material, with an almost translucent appearance at the surface when polished. This makes marble on of the most attractive naturals stones used in construction and its beauty has been recognised for thousands of years, with many ancient buildings utilising it for decorating walls and floors in a tile format.
Impurities present during the formation of the rock lead to the characteristic veining present in many marbles although some may have a more uniform colour. The colour of marble can vary very considerably, from pure white to jet black, with a whole rainbow of colours in-between. It should be remembered that marble is a natural material and as such will vary sometimes quite considerably from batch to batch.