Cergowa sandstone from Komancza
The quarry in Komańcza-Jawornik operated at least from 1870; this was a source of stone for the nearby construction of the TransCarpathian railway from Lviv and Przemyśl to Košice and Budapest.
In the 1950s and 60s it provided material for the construction of the road called Large Loop of the Bieszczady. Exploitation of the quarry ended in the late 1980s and early 1990s. Lower Oligocene sandstones are characterized by significant hardness and resistivity resulting from strong carbonate cementation of grains whose surface had been corroded prior to lithification of the sediments. Cergowa sandstone is recognized as the most valuable industrial rock material in the Carpathians. The highly valued technical properties of Cergowa sandstone are mainly linked with its mineral composition, structure and texture qualities, as well as diagenetic processes and 23-40% quartz content. Cergowa sandstone is characterized by very high compression strength, low absorbability, high abrasion resistance, and complete resistance to frost.
Comparsion of physicochemical properties
IN SERENA GREY AND GRANITE (e.g. STRZEGOM GRANITE)