period of creation: Precambrian (2.5 bn years ago)
excavation site: Międzygórze (Lower Silesia)
It comes from the Śnieżnik massif. The specimen was created throughout millions of years and was a constant subject to metamorphosis. First it started as a granite, an acidic igneous rock coming from the centre of the Earth. Later, as a result of high temperature and pressure collaterally segmented layers of minerals were created. Due to the activity of liquids and gases inside of the Earth, its composition was gradually altered, replacing substances with different ones.
The piece comes from the collection of Geological Museum of the National Geological Institute – National Research Institute.