1. A dark silicate mineral of the pyroxene group, commonly found in igneous rocks such as basalt and gabbro.
Usage: technical; mineralogy

Examples

• Augite is one of the most common minerals in mafic igneous rocks.
• The basalt sample contained visible crystals of augite.
• Geologists identified augite in the thin section of the volcanic rock.
• Augite typically has a dark green to black color and a glassy luster.
• The presence of augite indicates that the magma cooled relatively slowly.