Minerals have different colors.
Different minerals have different colors. But it is very rare to see the same mountain streaked with different colors. This picture is from Peru.
But 1400 years ago this was portrayed in the Quran:
Quran 35.28 Have you not seen that Allah sends down water from the sky? With it We produce fruits of various colors. And in the mountains are streaks of white and red, varying in their hue and pitch-black.
Mountains with streaked colors. But there is no such thing in the desert of Arabia; this image is from Peru.
How could an illiterate man who lived 1400 years ago have known about streaked colorful mountains?