Congratulations!!! You were right!
Granite is not a mineral.
Granite is a rock and not a mineral, but rocks are made of minerals. The minerals in granite - quartz, mica and feldspars - are all jumbled together. Some granites have more quartz than others; granite does not have a fixed chemical composition. Remember, although rocks are made up of minerals, that doesn't mean that rocks are minerals.
Having trouble? Go back to the basics to find out what a mineral really is.