Al-Khidr is not alive, rather he died. The Quran states that no human has been granted immortality, and a Hadith confirms that all people alive during the Prophet Muhammad's time passed away within a century. If Al-Khidr had been alive, he would have followed the Prophet.

The virtues of the Black Stone include: 1- It was sent down by Allah to this earth from Paradise. 2- It was whiter than milk, but the sins of the sons of Adam made it black. 3- It will come forth on the Day of Resurrection and will testify in favour of those who touched it in truth. 4- The Prophet kissed it, and his Ummah followed his lead in doing so. 5- Touching it is a means of expiating sins.