- another term for fluorite
- ‘The mining of nonmetallic ores - fluorspar, witherite, and barytes (commercial barite ore) - in the northern Pennines began about the time lead and iron mining were in decline.’
- ‘For the past three years, Jesse Fisher and his colleagues have spent the summer months extracting the mineral fluorspar from what they believe is the only existing mine of its kind in Britain.’
- ‘Problems with the treatment of the fluorspar ores to remove silica evidently limited the success of the mine during this period.’
- ‘The Northern Pennine orefield has been an important source of lead, fluorspar (commercial fluorite), and other metallic and nonmetallic ores for many centuries.’
- ‘The name fluorine comes from the mineral fluorspar, or calcium fluoride, in which it was found.’
Late 18th century: from fluor ‘a flow, a mineral used as a flux, fluorspar’ (from Latin fluor, from fluere ‘to flow’) + spar.
We take a look at several popular, though confusing, punctuation marks.