Vermont's complex geology has led to the development of a diverse and economically healthy minerals industry which began in Vermont over 200 years ago.
Granite is an igneous rock found along the entire length of the eastern part of the state.
It is mainly composed of feldspar, quartz and mica. Vermont granite is exported to many states and countries for use as building stone and is prominent in the Vermont State Capitol. Marble, a metamorphic rock composed of the mineral calcite, can generally be found in southwestern Vermont. The marble quarry in Danby is the world's largest underground quarry, covering twenty acres. Vermont marble ranges in color from pure white to black.