EMERALDS are one of the four "precious" gemstones (along with diamonds, rubies, and sapphires). They have been documented as being used as far back as approximately 4000 BC in Babylon. Emeralds were worshipped by the Incas, and in prominent use throughout Ancient Egypt, by Alexander the Great, Aristotle, and the moguls of India.
KYANITE is one of two minerals on Earth that is said to not retain any negative energy (the other being citrine). While kyanite can come in many different colors, it is most known for its rich blue hues.