dumortieriten.
/djuːˈmɔːtɪərʌɪt/ Mineralogy.
A silicate of alumina, occurring in minute crystals in gneiss, and showing unusual dichroism.
ΚΠ
1881 Amer. Jrnl. Sc. 3rd Ser. 22 157 Dumortierite..has a bright blue color.
This entry has not yet been fully updated (first published 1897; most recently modified version published online September 2018).
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n.1881