White crystalline limestone/marble (border line) was deposited as carbonate crystal sediment in relatively cold deep seawater. This sedimentation process, followed by subsequent lithification excluded the inclusion of magnesium into the crystal structure. Later compaction of the stone with lost of water being expulsed, didn’t involve the percolation of chemical elements such as magnesium/manganese and iron. This is visible in the rock formation with the absence of pink/red/brown/black veins. The tiles consists therefore of pure calcium carbonate crystals, which are extremely stable even in strong ultra-violet light conditions, so yellowing of the stone is nearly non-existent. Stone is recommend for all types of applications, including swimming pool tiles. Seen the strong light election when polished, we do advise it in a sanded finish for outdoor terrace applications.