The name Jade actually refers to two different but related minerals, Jadeite and Nephrite. Chemical formulas are given under these subsections.
Birthstone for Aries, Gemini, Taurus and Libra
Chakra alignment depends on colour
Properties: Jade comes in 6 different colours: yellow, red, black, green, white and purple. It has been considered a "good luck" stone for thousands of years, and has been treasured by the Chinese since at least 1950 BC. Ancient cultures in the Americas and Asia used it as a kidney healing stone. The Chinese use it to strengthen the body, increase longevity and cleanse the blood, and consider it a symbol of purity and wisdom gathered in tranquillity. It encourages self-realisation, particularly on a spiritual level, and is very balancing. It is also used in dream work.