anthophyllite

Noun
  1. A dark brown mineral of the amphibole group;
    Magnesium iron silicate (synset 114749623)
    is a type of: amphibole - a mineral or mineral variety belonging to the amphibole group
    belongs to: amphibole group - a group of minerals with similar crystal structures containing a silicate chain and combinations of chiefly sodium and calcium and magnesium and iron and aluminum

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