Etna is a collection of stone tiles made of lava. The heart of the Etna tile consists of volcanic rock, that is carved, polished and calibrated to a thickness of 14 mm. Onto this base a special process combining glazing and brushing is applied; the material is then fired in a gradual process lasting more than four hours at high temperatures. The result is a fusion of the glazes in the natural markings of the lava, creating a combination of shine, shadow and texture with no two pieces alike. Base pieces are available in large, rectangular formats, and numerous mesh-based formats in which the shine and movement take on even greater strength. Etna is for interior use on either walls or floors and does not require any special treatment on installation. According to the producer, it is highly resistant and easy to clean and maintain, simply requiring neutral soap and water.