What are the properties of diorite?

First, diorite is an intrusive igneous rock, meaning it solidified from magma under the surface. This extra time spent underground cooling allowed it to have larger crystals than a rock formed from magma cooling above ground. Diorite is considered an intermediate rock, mostly composed of the mineral plagioclase feldspar, with biotite mica, hornblende, pyroxene, quartz, and olivine. Its mineralogy causes it to be fairly dark in color, ranging from gray to green in tone. Diorite rock is very durable, and ancient structures and artwork created with it still survive.