Red porphyry- paving and road slabs 50x50x8cm
It is a colloquial name that describes the group of volcanic or vein igneous rocks with a porphyry structure - with the naked eye we can see single crystal stuck with the rock cake.
The most common porphyry is red or brown, less often grey with green tinge. Porphyry begins to look effective only after carving and polishing. Currently, it is used as an aggregate for road construction. Flamed red granite is an alternative.