Amphibole

//ˈæm.fɪˌboʊl// noun

Definitions

Noun
  1. 1
    Any of a large group of structurally similar hydrated double silicate minerals, containing various combinations of sodium, calcium, magnesium, iron, and aluminium.

    "Remember when we could see the mountain's peak? The sparkle off the amphibole."

  2. 2
    a mineral or mineral variety belonging to the amphibole group wordnet

Etymology

From French amphibole, coined by René Just Haüy from Ancient Greek ἀμφίβολος (amphíbolos, “ambiguous”), in reference to its many forms.

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