Geschichte: This volcanic stone was found in the Radvansky quarry in the city of Uzhhgorod. There are no active volcanoes in Ukraine, but millions of years ago everything was different.
Geologie: Andesite is a volcanic rock with varying crystal sizes, indicating that the lava it formed from was rather ‘thick’ and slowly flowing. Its chemistry lies between (silica-poor) basalt and (silica-rich) granitic rock.