helenite

Noun

Meaning

helenite (uncountable)

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

Source: en.wiktionary.org

Synonyms

mount st. helens obsidian

Close letter words and terms

Helene Helengrad helenin helenium Helenium autumnale Helenium hoopesii