Identifying Granitoids and Other Granite Rocks - ThoughtCo
Granite is a plutonic rock that has between 20 percent and 60 percent quartz. Menu. Home. Granitoids. Search. Search the site GO. Science. Geology Types of Rocks Basics ... OK, we've dealt with the quartz and the feldspars. Granitoids also have dark minerals, sometimes quite a lot and sometimes hardly any.