pyroxene
spanner barb
plural of smash cut
(mineralogy) Any of a group of crystalline minerals containing silicates of iron, magnesium and calcium.
(countable) Someone who dodges (avoids something by quickly moving). / (countable) A person full of tricks or street smarts.
その玄武岩試料には鉄・マグネシウム・カルシウムを含む一群の結晶性珪酸塩鉱物（輝石）が豊富に含まれており、顕微鏡下で暗い緑黒色を呈していた。
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