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