Igneous textures include the rock textures occurring in igneous rocks. Apatite is most commonly found in sedimentary, metamorphic, igneous, and volcanic rocks. Other sources also include chemically dissolved phosphate minerals from igneous and metamorphic rocks. Mica is widely distributed and occurs in igneous, metamorphic and sedimentary regimes. Tuff can be classified as either sedimentary or igneous rock. Ilmenite is a common accessory mineral found in metamorphic and igneous rocks. Quartz is a defining constituent of granite and other felsic igneous rocks. The protolith may be a sedimentary, igneous, or existing metamorphic rock. The lake is mainly constructed of interfingered igneous and metamorphic rock. No igneous or metamorphic rock is exposed on the surface. Sparta is in the Highlands which is composed of igneous and metamorphic rock. A variety of igneous and metamorphic rock supports Grass Valley. Quarrying of the igneous and metamorphic rocks has also been a significant industry. Basalt is the rock most typical of large igneous provinces. The Coast Mountains consists of deformed igneous and metamorphosed structurally complex pre-Tertiary rocks.