the Kaaba has been torn down and rebuilt several times, as far as I know the old stones and mortar all have been discarded, save the precious celestial clitoris, eh-hem, I mean, Black Stone.
The only part of the Kaaba that anyone claims to be holy is THAT particular stone, and I have never heard of anyone knocking off a chunk to be tested for independent verification of it's meteorite status. no.
last time I heard they tested Zam Zam water independently though, it was full of Arsenic. Cheers to all the Muslim cancer patients worldwide who eagerly await a bottle of it from returning relatives, after Hajj
