It distinctive beauty, made the ancient believe that it protects against many shapes of evil, especially all kind of illness. The unmistakable, typical green color gave this stone its world wide known appeal. In 1703 A.D Peter the great cezar of Russia decorated his palace in St Petersburg with malachite Technical/details:Malachite is a beautiful green earth stone with black bands. It is beautiful in earrings, necklaces, and pendants. Care and Treatment:Malachite is especially fragile. Protect malachite from scratches and sharp blows. Also avoid large temperature changes (such as leaving it be a heater vent or in a hot car). Do not clean malachite in a home ultrasonic cleaner. Washing malachite in water will remove its finish. Malachite is always coated with a protective polish. This polish will wash off. Imitation malachite has very regular black or white banding. Hardness:Malachite has a hardness of 4. Where Found:Malachite is found most everywhere. However, the most important mine is in Zaire.