A curator of rocks from different parts of the world inspired the Les Roches collection, where each rock forged the path for the creation and a unique material. Onyx is from limestone origin, a typical rock in the Italian territory, with its golden and "bruno" tones. Reproduced in porcelain tiles with polished and natural finishing. It is also known as alabaster marble. Onyx is a rare beautiful stone, yet, it is very sensitive for some uses. The reproduction in a porcelain tile must comply with technical requirements and valorize sustainability. Opal is a mineral that maintains a large amount of water in its composition, resulting in a translucent and depth effect bringing about the diffraction of light as diverse colors. The most noble quarries are concentrated in Australia; the origin of the rocks that inspired the creation of the Portobello Opal Porcelain tiles.