Teschenit

alt=Image of a small, non-uniform and jagged white rock with black stripes of mineral running across the surface (an image of teschenite)|thumb|Sample of teschenite from Poland Teschenite is a type of coarse or medium grained igneous rock, akin to gabbro or dolerite, that contains essential analcime. Its name is derived from the region of Teschen, where it was discovered. The term crinanite has previously been used as a synonym for teschenite (particularly for deposits with increased analcime content), but there have been attempts to standardise terminology by stopping its use. Rocks related t