Blue Topaz is known as the gem that has the power to improve one’s communication skills. A blue topaz pendant may make you a more eloquent and confident speaker. Emerald is associated with Venus, the Greek goddess of love and beauty. They say an emerald pendant can protect lovers from unfaithfulness. Sapphire has always been associated with the sacred and divine. A sapphire pendant is said to bring serenity and purity to the wearer.