The following information is extracted from The Book of Stones and other sources:
Lapis Lazuli is a sodium aluminum silicate with sulfur, chlorine and hydroxyl, and various inclusions of Pyrite and White Calcite. The ancient Greeks and Romans called the stone sapphuriu until thew term Lapis Lazuli began to be used in the Middle Ages. In Latin the name means "blue stone." The finest Lapis Lazuli comes from the West Hindu Kush mountains of Afghanistan, however, other lower quality deposits may be found in Chile and Russia. The Mohs hardness ranged between 5 and 6.
In The Book of Stones Naisha Ahsian states: "Lapis Lazuli is one of the best minerals for activating the higher mind and psychic abilities."
Answers.com defines Lapis Lazuli as an opaque to translucent blue, violet-blue, or greenish-blue semiprecious gemstone composed mainly of lazurite and calcite. Obviously, the deeper the blue, the more valuable the stone, but lapis mixed with quartz or chrysocolla or with pyrite flecks is equally beautiful.
Below are a few of the Lapis stones I have wrapped.