helenite

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English

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English Wikipedia has an article on:
Wikipedia

Alternative forms

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Etymology

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From Helen +‎ -ite. From Mount St Helens, whose volcanic ash is used to manufacture helenite.

Noun

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helenite (uncountable)

  1. A greenish artificial gem, made by melting and vitrifying volcanic ash from the 1980 eruption of Mount Saint Helens.

Synonyms

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