Qarmatians sacked Mecca and Medina. In their attack on Islam's holiest sites, the Qarmatians desecrated the Zamzam Well with corpses of Hajj pilgrims and took the Black Stone from Mecca to al-Hasa. Holding the Black Stone to ransom, they forced the Abbasids to pay a huge sum for its return in 952.

The revolution and desecration shocked the Muslim world and humiliated the Abbasids. But little could be done; for much of the tenth century the Qarmatians were the most powerful force in the Persian Gulf and Middle East, controlling the coast of Oman and collecting tribute from the caliph in Baghdad as well as from a rival Isma'ili imam in Cairo, the head of the Fatimid Caliphate, whose power they did not recognize.