Nephrite "hei-tiki" (neck pendant). These are believed to have their own "mana", are handed down as valuable heirlooms, and often given as gifts to seal important agreements. It has also been used for a range of tools such as adzes, as Māori had no metal tools before European contact. Commonly called "greenstone", jade jewellery in Māori designs is widely popular with tourists. Stone is often imported from Canada, China and Siberia, and Ngai Tahu runs a pounamu certification scheme to verify the authenticity of New Zealand stone. Nephrite Nephrite is a variety of the calcium, magnesium, and iron-rich amphibole minerals tremolite
Empire Nephrite (Fabergé egg) by a specially commissioned group of experts, a unique historical document was found – the "List of the personal property of the Dowager Empress Maria Feodorovna, located in storage at Gatchina Palace" by 28 July 1917. This 12-page booklet mentions at least 150 items, including 7 Imperial Fabergé eggs that belonged to the Dowager Empress Maria Feodorovna. On the second page of this document, as number 10, there is a description "Egg with gold mounts, on two nephrite columns, with portraits of Gr. Dss. Olga Alexandrovna and Duke P.A. Oldenburg inside". This description is the most accurate that Fabergé researchers