輝岩（英文：pyroxenolite），屬於岩漿岩、侵入岩、超基性岩，是輝石含量大於90%的區域變質岩石，常與橄欖岩共生。顏色多為黑色、灰黑色。
成分
透輝石、紫蘇輝石
產狀
結構：中粗粒變晶
構造：塊狀構造
產出：構造透鏡體或夾層
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