Haven’t you seen Lord Allah send down water from the sky, thus He produced fruits in different colors with it, and among the mountains, there are streaks of various colors, white, red, and raven black.
Just as fruits and grains are of different colors, marbles taken from the mountains and land also come in various colors, such as white, red, and raven black. Although such information was present in the Lord’s Book before, it has only recently come to the knowledge of mankind. Nowadays, it is known to people everywhere. This knowledge, explained in the Lord’s Book, shows that the Book is from the Lord of the universe, who is the Three-Time Knower. It is stated in verse 41: 53: "The Lord will show them His signs on the horizons as well as in themselves until it becomes clear to them that indeed Adhikr is the Truth." See explanation 13: 3-4; 17: 102.