Travertine is a pale stone built by springs over long ages and used in Roman buildings. It is read as patience, endurance and foundations laid slowly.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.