How Is Granite’s Color Determined

Granite is a natural stone that's made up of other types of minerals like quartz, potassium feldspar, mica, amphiboles, and trace amounts of other materials. A typical slab of granite will contain 20–60 percent quartz, 10–65 percent feldspar, and 5–15 percent mica. The color of the granite depends on the amount of each of these minerals that it contains.
The proportions of these minerals have a lot to do with the molten rock that cooled to the original form of the granite. If that molten rock had a large quantity of potassium feldspar, it's likely that the granite would take a pinkish color. If the molten rock had a large quantity of quartz and amphibole, the granite is more likely to be black and white speckled-which is a very common pattern seen on countertops.