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
Rock, Northumberland Rock, Northumberland Rock is a village in Northumberland, England about north of Alnwick. The single street has on one side cottages and gardens; on the other, an ornamental lake. At the end is a little Norman church; and beyond that, the battlements and towers of Rock Hall. The sundial and the inscribed stone in the end wall of the schoolroom were originally part of a residence of the Salkelds which stood on the site. The Hall was then their seat – their coat of arms still remains above an old, blocked doorway to the right of the modern entrance. Later