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White Marble before HCl
Price range: $19.00 through $400.00
Gneiss from Queenstown, New Zealand

Gneiss ( /ˈnaɪs/) is a common distributed type of rock formed by high-grade regional metamorphic processes from pre-existing formations that were originally either igneous or sedimentary rocks. It is often foliated (composed of layers of sheet-like planar structures). The foliations are characterized by alternating darker and lighter colored bands, called “gneissic banding”.

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