All perfect praise be to Allah, The Lord of the worlds. I testify that there is none worthy of worship except Allah and that Muhammad is His slave and Messenger.
Marble was not discovered in the modern times; rather, it was known in the ancient times. Marble is defined in Arabic lexicons as follows: "A white, loose stone," as stated by the Arabic linguist Al-Khaleel ibn Ahmad (d. 170 H). The Arabic lexicons that followed all provided a similar definition.
As for the story that you mentioned, we have searched for it but could not find it in any source book.
Allah knows best.