Jaspillite

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

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.[1]

References

  1. ↑ Gemstones of North America - Volume 1, John Sinkankas - 1959 p.345

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