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Examples of columbite
columbite
Both tin and columbite were extensively mined in the area up until the 1960s.
From the en.wikipedia.org
Hatchett found the element in columbite ore and named it columbium.
From the en.wikipedia.org
These include granite, kaolin, columbite, channockete, iron ore, baryte, aquamine, gemstone, phosphate, limestone, among others.
From the en.wikipedia.org
Even the coltan computer chips in the latest Sony Play Station are made from columbite-tantalite, a mineral mined in the Congo.
From the time.com
Columbite-tantalite minerals are most usually found as accessory minerals in pegmatite intrusions, and in alkaline intrusive rocks.
From the en.wikipedia.org
It is a soft, grey, ductiletransition metal, which is often found in the pyrochlore mineral, the main commercial source for niobium, and columbite.
From the en.wikipedia.org
- Niobite: a black mineral that is an ore of niobium and tantalum
