When travertine or tufa (calcareous sinter) is deposited by hot springs, it can be due to the loss of carbon dioxide as water emerges at the surface, which lowers the solubility of calcium carbonate and causes it to precipitate. High rates of evaporation in hot-spring pools also lead to supersaturation, which helps form travertine. 

Travertine found in caves is simply the result of the complete evaporation of water that contains a high concentration of calcium carbonate. This stone is suitable for both interior and exterior use in residential settings, including floors, walls, stairs, foyers, entrance ways, bathrooms, and living areas.