A fluorescent mineral, white when pure, which consists of calcium tungstate and is an important ore of tungsten.
- ‘World War II brought a tungsten boom, and the bright fluorescence of scheelite made it an obvious target for night prospecting.’
- ‘Well-crystallized specimens are rare; most scheelite in the district does not form euhedral crystals.’
- ‘At least ten tungsten minerals are reported, but ‘wolframite’ and scheelite are the only two with significant economic distribution and concentration.’
- ‘The common occurrence of scheelite rather than ferberite is believed to reflect lithologic differences in host rocks.’
- ‘As a member of the Commonwealth Minerals Committee during World War II, he identified the potential of King Island scheelite.’
Mid 19th century: from the name of Carl W. Scheele (1742–86), Swedish chemist, + -ite.
We take a look at several popular, though confusing, punctuation marks.