Scottish National Dictionary (1700–)
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First published 1976 (SND Vol. X, list of scientific terms with Scottish connections).
This entry has not been updated since then but may contain minor corrections and revisions.
STEWARTITE. Geol. A magnetic variety of bort (1911 Nature LXXXVII. 550).
[Named by J. R. Sutton after James Stewart (1855–1944), of Dalkeith, mining employee of De Beers at Kimberley, South Africa.]