n.輝綠巖

A mottled green rock composed of diabase. 綠色蛇紋石含有輝綠巖并帶有花紋的綠色巖石

A dark, fine - grained igneous rock;diabase. 粗玄巖，輝綠巖一種暗色微粒火成巖；輝綠巖

A dark,fine - grained igneous rock;diabase. 粗玄巖，輝綠巖一種暗色微粒火成巖;輝綠巖

A dark,fine.- grained igneous rock;diabase. 粗玄巖，輝綠巖一種暗色微粒火成巖;輝綠巖

What are the characteristics of diabase? 輝綠巖的特征是什么？