The porphyry. 


Natural porphyry boasts a wide range of colours as to the area of extraction.
The Pianacci Multicolor sums up the variety of the best pastel tones that lend themselves to all types of combinations.

The characteristics of porphyry

Resistance to freezing
Resistance to acids
High specific weight
High compression strength: 2200 kg/cm2
High bending strength 225 kg/cm2
High impact strength
Warm pastel colours
Non-slip surface
High wear resistance
Low repair costs
Long life
Resistant to temperature shock, low coefficient of expansion.

* from "Il manuale del Porfido" page19 and 20

More than just stone


Often the word porphyry is associated with cubes, cobblestones and fan-shape laying patterns that characterise many splendid squares.
But porphyry is not just this. In Italy and Europe we can admire many applications of diverse types of porphyry products associated with local stones so that the result matches with the style and history of the area. Today we note that classic production systems, based on natural slab splitting, have been backed up by the same technologies used for marble and granite, based for example on sawing and flaming.

The extraordinary range of variation, from the smallest 4 cm size cube to giant stones larger than a metre, allows us ample liberty of composition, from small details to monumental structures, according to the use and the effect that the entire project must deliver. The strength of Horus derives from nature that over 260 million years has created and offers us a product already perfect: with its pastel colours, the rough quarryface that offers grip but is so pleasantly irregular as to avoid tripping, the resistance to frost and chemicals and its robustness under pressure and wear.




Unionporfidi s.r.l. Via Pianacci, 2 - 38040 Fornace (TN) - Italy
Tel. +39 0461 849300 - Fax +39 0461 849406 - P.Iva 01425300223 - E-mail: 

Project by Graffiti2000