שמות, פרק ל״ט, פסוק י״א

The rows of precious stones set into the High Priest's Breastplate carry deep spiritual symbolism. In the second row, the specific pairing of the sapphire and the diamond conveys a message about the covenant of circumcision. The diamond serves as a symbol for the circumcised person. Its placement is highly deliberate, sitting immediately after the sapphire. This arrangement teaches that a person who enters into this covenant earns the privilege of finding shelter under God's Throne of Glory. The sapphire is directly linked to the Throne, recalling the biblical vision of Divine revelation where a sapphire brick appeared beneath His feet [שפתי כהן].