Trentino porphyry, a primary stratified effusive volcanic rock, dates back 270 million years and consists of a very compact underlying vitreous mass containing quartz crystals that give the products a number of outstanding physical and mechanical characteristics able to stand up well to all the disturbing physical, biological and chemical-mechanical actions caused by nature and man.
A lab operator testing chemical and physical properties of some porphyry rocks
The technical laboratory tests carried out in accordance with the European regulations demonstrate that porphyry is resistant to frost and salt, boasts high values in terms of compression and bending strength, and more importantly, it is not slippery no matter where it is used, nor does it wear down due to the use or traffic. In addition, it is not altered by acids. In short, this stone has no contraindications: the more porphyry is exposed to natural elements, rain, snow, frost and sun, the better it performs.