Jaspillite

Jaspilite sample from Minas Gerais, Brazil

Map of the Canadian Shield (the shades of red) in parts of Canada and the Northern United States

Jaspillite, or jaspilite, is a chemical rock formed similar to chert. It is usually iron rich. It also has the name jasper taconite.

Jaspillite is typically a layered mixture of hematite and quartz. It is common in the banded iron formation rocks of Proterozoic and Archaean age in the Canadian shield of North America.

Jaspillite is also a sedimentary rock.in certain lead-zinc ore deposits.

It is used as a gemstone.

Other websites

• Mindat.org data