Is it true that the Qarmatians stole the Black Stone for 30 years in Yemen, and tried to dig to reach the grave of the Messenger, may God’s prayers and peace be upon him, to steal it for economic purposes?

Historians mentioned that the Qarmatians took the Black Stone from the Kaaba after killing the pilgrims and plundering their wealth. They kept it for 22 years (317-339 AH), then returned it. Also, in 557 AH, the Christians of Andalusia tried to dig to reach the Prophet’s grave, peace and blessings be upon him, to transfer his body, but Sultan Nur al-Din Zengi thwarted the attempt and killed the perpetrators. He then dug a trench around the noble chamber and poured molten lead into it. It was also mentioned that the Fatimid ruler attempted to transfer the body of the Prophet, peace and blessings be upon him, and his two companions to Egypt.