aph·a·nite /ˈæfəˌnaɪt/
非顯晶岩; 隱晶岩
Aph·a·nite n. Min. A very compact, dark-colored ░ock, consisting of hornblende, or pyroxene, and feldspar, but neither of them in perceptible grains.
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aphanite
n : fine-grained homogeneous rock (such as basalt) containing
minerals undetectable by the naked eye