Jaspillite, or jaspilite, is a chemical rock formed similar to chert, but is generally quite iron rich. It is also known as jasper taconite. Jaspillite is typically a banded mixture of hematite and quartz common in the banded iron formation rocks of Proterozoic and Archaean age in the Canadian shield.
It is used as a gemstone.
- Gemstones of North America - Volume 1, John Sinkankas - 1959 p.345
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