Rochlitz porphyry tuff

Rochlitz Porphyry is a tuff that has piled up 80m thick in cooled lava on the Rochlitzer Berg, a volcano that was active in ancient times.

Its siliceous-clayey base mass is small-grained, porous and contains numerous roundish quartz, as well as kaolic feldspars. Scattered sprinkles of dark magnesia, bluish lipilli and porphyry balls give the stone a unique color and texture.

The mostly brick-red to yellow bands are also characteristic. They are permeated with brownish to white veins, which are filled partly with chert and partly with quartz. Its bright red hue is dominant and enduring, which it retains equally at all stages of processing and after many years.

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Surface Treatment:

Image: Rochlitzer Porphyry