Is Diorite a Crystal

Diorite is a coarse-grained intrusive igneous rock. It contains large interlocking, randomly oriented crystals. It is a dark coloured rock, usually medium to dark grey, containing many mafic crystals.

What is the difference between granite and diorite?

The most obvious difference between granite and diorite is that diorite usually does not contain quartz, whereas granite is composed mostly of quartz. … Granite and diorite do have some things in common, however. They are both types of hard, igneous rock, and is each known for its durability.

Does diorite have quartz?

Diorite is a coarse-grained, intrusive igneous rock that is intermediate in composition between granite and gabbro. Diorite is composed primarily of plagioclase feldspar, amphibole, and pyroxine minerals with small amounts of biotite mica. It typically contains very little quartz.