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) some Fabergé researchers were of the mistaken opinion that this egg featured a portrait medallion of Alexander III of Russia, though the original bill did not refer to a portrait of Alexander III. This mistake was result of a misinterpretation of the Moscow Armory Chamber valuables selection list. This list noted an "Egg from nephrite, on a golden base, and with portrait of the Emperor Alexander III in a medallion". Because of this, many researchers were certain that the 1902 Imperial egg featured an Alexander III portrait, though there is no evidence to support this. However, in 2015, during research