The park is named for a local name for staurolite from a legend in the area.
13.
These minerals, known as index minerals, include sillimanite, kyanite, staurolite, andalusite, and some garnet.
14.
The blemish is an intrusion of staurolite, a crystalline kind of rock also known as fairy stone or cross stone.
15.
Staurolite is a common mineral of clay-rich sediments that have been metamorphosed at moderate depths, heats and pressures.
16.
Almandine occurs in metamorphic rocks like mica schists, associated with minerals such as staurolite, kyanite, andalusite, and others.
17.
In thin sections staurolite is commonly twinned and shows lower first order birefringence similar to quartz, with the twinning displaying optical continuity.
18.
At both banded iron formations ( metamorphosed to staurolite-grade itabirites ) have been enriched to form haematite and haematite-goethite mineralisations.
19.
It is famous for its distene and staurolite crystals and for having given the surname " Forni " which is now common throughout the Leventina region.
20.
But to Harte of the University of Edinburgh, the unusual presence of the staurolite is not a problem but one of the most interesting features of the discovery.
