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.
AQUAMARINE is the blue version of Beryl (also containing Morganite, Emeralds, etc.). It was believed to be the treasure of mermaids as well as symbolic of eternal youth and happiness. It was used as good luck talismans for travelers and sailors.