plural -s
: a silicate CaFe3Si2O8(OH) of iron and calcium and sometimes manganese related to epidote and occurring in black prismatic crystals and columnar masses (hardness 5.5–6, specific gravity 4.0)

Word History


German ilvait, from Ilva (Elba), Italian island in the Mediterranean + German -it -ite

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Dictionary Entries Near ilvaite

Cite this Entry

“Ilvaite.” Dictionary, Merriam-Webster, Accessed 18 Apr. 2024.

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