Aplite is a type of igneous rock that is primarily composed of feldspar and quartz. It is often associated with granite and can be found in various shades of white, gray, pink, and green. Some synonyms for aplite include pegmatite, which is similar in composition but has larger crystal sizes, and granophyre, which has a texture that is more finely crystalline than aplite. The term felsite is also used to describe similar rocks with a fine-grained texture, while microgranite refers to igneous rocks that are chemically similar to aplite but have a smaller grain size. Regardless of the term used, these rocks are known for being relatively hard, durable, and resistant to weathering.