Piamontini

Limestone is a sedimentary rock formed by layering of silt and sediment, predominantly calcium carbonate, over hundreds of millions of years. Pressure from oceans and geological compaction have compacted and hardened the material. Limestone is often scattered with fossils and quartz pockets as the areas of formation were commonly brimming with ancient life. This makes limestone particularly striking as pool pavers or limestone tiles.

Limestone encompasses a massive variety of stone colours, strengths, and suitabilities. It is a very consistent material often with a strong base colour and then many veins and lines forming throughout.  It is the father of marble and travertine both of which are formed from different geological metamorphosis of limestone. 

Yes, stone tiles are perfect for both wall and floor tiles, as well as kitchen splashback tiles. 

Although there are some specific grout sealers the best option is to use an internal grout that doesn’t require sealing. There are several options on the market for this. Externally if the grout sealing is critical, it is better to seal the whole paved scape not just the grout.