響きょう岩がん

noun

phonolite; clinkstone

A rare volcanic rock that produces a ringing sound when struck. Technical term used in geology.

• 響きょう岩がんは叩たたくと金きん属ぞく的てきな音おとがする火か山ざん岩がんです。

  Phonolite is a volcanic rock that makes a metallic sound when struck.