Travertine is a limestone deposited by hot mineral springs. As carbon dioxide escapes from the water, calcite precipitates in layers and traps gas and plant matter, which gives travertine its characteristic holes and linear banding. It built the Colosseum and is firmly back in fashion in contemporary interiors and furniture.
The holes can be filled with cement or resin, left open, or softened by tumbling for an antique look. The cut direction changes the look completely: vein-cut shows linear bands, while cross-cut (fleuri) shows a cloudy, flowery pattern.
Grades (premium, standard, commercial) differ mainly in shade consistency and the size and number of holes. Price follows the grade closely.
- Rock type
- Sedimentary (hot-spring limestone)
- Hardness
- 3 to 4 Mohs
- Water absorption
- Higher than marble; varies by density
- Acid sensitivity
- High: etches
- Cuts
- Vein-cut (linear) or cross-cut (cloudy)
- Finishes
- Filled and honed, polished, tumbled, brushed, chiselled