Turquoise is one of the first gemstones to be used in jewelry. In many ancient cultures it was a symbol wealth, strength, happiness, protection from harm, and good fortune. A gift of turquoise signifies luck and friendship.Probably one of the most recognized semiprecious gemstones in existence, turquoise has been popular since prehistoric times. This stone is a hydrated aluminum copper phosphate that often contains iron. Its name comes from French pierre turquoise, meaning "Turkish stone," a reference to where Persian material passed on its way to Europe. It is considerably softer than quartz and thus is usually treated in some way for stability. It occurs naturally in shades ranging from sky blue to grey-green, usually in locations where copper is hidden in the soil in high concentrations. The blue color is caused by copper, while the green color is caused by iron or chromium. Many qualities and types of "turquoise" are available on the market today.Turquoise is considered a stone of wholeness, promoting the sense of unity of the self and oneness with all that surrounds us. It is said to make one feel at home in both the physical and spiritual worlds. Turquoise is said to open all chakras, permitting the attributes of love, completeness and communication to flow through the body and increasing spiritual bonding. It is especially connected to the fifth (throat) chakra and is believed to assist in opening the fourth (heart) chakra. It also is believed to assist the absorption of nutrients while strengthening the immune system and stimulating tissue regeneration. Crystal healers recommend it for detoxification of alcohol, poisons or radiation. Turquoise is mined in the U.S.A. (Nevada, Arizona, New Mexico), China, Peru, Mexico, Persia (Iran), Tibet, Siberia, Africa, Australia and Europe.