Diamonds are the hardest natural substance known. Composed of pure carbon, the foundational element of life, it is the one and only “10” on the hardness scale by which gems are measured. It's name is derived from the Greek adamas, meaning “indomitable,” “unbreakable,” or “untamable,” and diaphanus, meaning “transparent". Maybe because of their strength, the diamond has been known since antiquity as the “stone of invincibility,” bringing victory, fortitude and courage to its wearer. It is associated with lightning and fearlessness, and for its properties of protection.