THE DIAMOND GEMSTONE IS THE SIXTH STONE IN THE BREASTPLATE OF JUDGEMENT, REPRESENTING THE ISRAEL TRIBE OF NAPHTALI.
Sacred scripture reveals Dan, and his brother Naphtali, as sons of Jacob [Israel] borne to Bilhah, the handmaid of Jacob's wife Rachel.
The wisdom of the ancient sage, Richard of Saint Victor, reveals Bilhah as representing human imagination, and her offspring Dan & Naphtali as representing, “the perception of pain to come”, and the realization of the “joy to come."
Jacob's blessing bestowed upon Naphtali:
"O Naphtali, sated with favor, full of the blessing of the Lord, possess the west and the south."
The tribe of Naphtali inherited a very fertile part of the Land of Israel - the Valley of Genosor [the Sea of Galilee], where fruits ripened first in the whole land. It was from this part of the land that the First Fruits [Bikurim] were brought to the temple in Jerusalem as a thanksgiving offering to God. It was this same land of Israel where the Lord Jesus Christ performed many of His Heavenly miracles and taught his disciples how to offer "first fruits" to God in the New Covenant.