The miracles and extraordinary signs of the Holy Quran are of four types:
One, miracles relating to the intellect
Two, miracles relating to knowledge.
Three, miracles relating to spiritual blessings,
Four, miracles relating to extraordinary matters.
The first three are miracles of the inherent qualities of the Holy Quran. They are very grand and are susceptible of obvious proof. They can be witnessed in every age like visible realities, but the fourth kind are external matters which are not inherent in the Holy Quran. Of these is the miracle of the splitting of the moon. The true excellence and beauty of the Holy Quran are exhibited in the first three kinds of miracles. Indeed, this is the great sign of all Divine words that these three kinds of miracles should be found in them. In the Holy Quran all three are found in a high and perfect and complete degree, and they are put forward by the Holy Quran repeatedly as proof of its being matchless and peerless.
As it is said in Quran- If all men, high and low, were to combine to produce the like of this Quran, they would not be able to produce the like thereof even though they all help each other in the effort (17:80). Qur'an is miraculous by its nature in being a revealed text from God, and that similar texts cannot be written by human endeavor.Miracle in the Qur'an can be defined as a supernatural intervention in the life of human beings.
Before getting in to it i just wanna make sure that you should have a clear view of "what we mean by miracle ? Here are some definitions:-
"An event that appears so inexplicable by the laws of nature, that it is held to be supernatural in origin or an act of God."
"A person, thing or event that excites admiring awe."
"An act beyond human power, an impossibility."
THE QURAN IS TOTALLY A MIRACLES BUT I LIKE TO SHOW SOME OF THE MIRACLES THAT YOU CAN WITNESS BY YOUR OWN EYES. CHECKOUT ALL THE MIRACLE THAT EXIST.