Hematite, Hiddenite, and Kalunite looked identical to Zoisite, Nephrite and Jadeite respectively. Both nephrite and jadeite were used from prehistoric periods for hardstone carving. The other mineral species known as jade is jadeite, which is a variety of pyroxene. It is famous for its jade mines which produce the world's best quality jadeite. Jadeite is a pyroxene mineral with composition NaAlSiO. Minerals associated with jadeite include&colon; glaucophane, lawsonite, muscovite, aragonite, serpentine and quartz. Translucent emerald-green jadeite is the most prized variety, both historically and today. The necklace was typically constructed of jadeite magatama separated by cylindrical bored-holed pieces of jasper. Burma (Myanmar) and Guatemala are the principal sources of modern gem jadeite. With increasing pressure, albite breaks down to form the high-pressure assemblage of jadeite plus quartz. Omphacite compositions are intermediate between calcium-rich augite and sodium-rich jadeite. Pyroxenes rich in both the jadeite and augite endmembers are known as omphacite. The tomb contained rich offerings of jadeite, ceramics, shell and works of art. The porcelain head was replaced by a new one made of white jadeite. The green stones were also analyzed and determined to be a form of jadeite.