travertine (ESN 49455 )

Often referred to as "travertine marble", this stone is actually more closely related to limestone but its impurities can give it a marble-like appearance.

A sedimentary calcite imprinted with small fossils.

• One Shell Plaza (Houston, U.S.A.)
• US Bank Plaza I (Minneapolis, U.S.A.)
• Louisiana State Capitol (Baton Rouge, U.S.A.)
• The Plaza on Dewitt (Chicago, U.S.A.)