Andeer green granite is a green-coloured gneiss with a medium grain and small white fragments, moderately to strongly schistose.
The composition of this rock can be summarised as small grains of grey glassy quartz with larger grains of feldspar and chlorite, which give it its dark green colour. It also contains fenghite mica, which also contributes to the dark green colour.
It is a rock that is highly resistant to frost, acids and alkaline solutions. There are three varieties of green colouring depending on the exact place of extraction.
Compared to Ticino gneiss, this granite is more difficult to work with as it is moderately flaky. Most of the production is in fact sawn into slabs.
References for use of the material
Centrum Bank, architect Hans Hollein, Vaduz (Liechtenstein).
The main source of the description
Material-Archiv. (2024). Andeer.
The original source of the characteristic values
Kündig, R. (1997). Die mineralischen Rohstoffe der Schweiz. Schweizerische Geotechnische Kommission.
