SG Heritage Dictionary

Tantalite [Noun] Webster's Dictionary 1828

The ore of tantalum or columbium, a newly discovered metal. It is an iron black color, sometimes with a tinge of blue. It is imbedded in angular pieces, from the size of a pea to that of a hazel-nut.

Tantalite [Noun] Webster's Dictionary 1913

A heavy mineral of an iron-black color and submetallic luster. It is essentially a tantalate of iron.