Posted in Search What is Coltan? 5 Facts You Should Know | Mining, Uses and … February 25, 2021 Coltan ore itself is a vessel for technology minerals tantalum and niobium. Coltan, or columbite tantalite, is an ore from which niobium and tantalum are extracted. https://investingnews.com/daily/resource-investing/critical-metals-investing/tantalum-investing/coltan-facts/