enigmatite

noun

enig·​ma·​tite

variants or less commonly aenigmatite

ə̇ˈnigməˌtīt,

ēˈ-,

eˈ-

plural -s

: an imperfectly known mineral formerly classed with the amphibole group that occurs in black triclinic crystals and is essentially a silicate of iron, titanium, and sodium (specific gravity 3.74–3.80)

Word History

Etymology

German ainigmatit, änigmatit, from Greek ainigmat-, ainigma + German -it -ite

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