SAPPHIRES are a stone steeped in history and appear in the lore of most cultures and religions. The stone is said to be a Stone of Wisdom and signifier of royalty for millennia. Blue sapphires in particular stand for wisdom, order, structure, and self-discipline.
DIAMONDS: known as the "stone of invincibility" (due to its hardness as a stone), diamonds are symbols of victory and the superior strength (physical, emotional, mental) of the wearer. Diamonds have also been referred to as the "king of gems", being the hardest known natural substance as well as its superior light reflective abilities.