https://unitedwithisrael.org/what-is-jerusalem-stone/
Jerusalem stone:
One of the most famous verses in Psalms (118:22) is translated as follows, “The stone that the builders despised, will be the cornerstone.” This is a Jew’s fervent prayer – although people today may not recognize the greatness and holiness of the stones, these stones will be an essential part of the third and final Holy Temple. We pray that the stones of the Holy Temple will once again usher in an era of peace and shed light on all the nations of the world. We wait for this day, when we will clearly understand how special the stones actually are.
Interesting.