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
Ornamental Gardens, Ottawa Ornamental Gardens, Ottawa The Ornamental Gardens are located at Agriculture and Agri-Food Canada's Central Experimental Farm in Ottawa, Ontario Canada. Once used as a test facility for the development of winter hardy roses, weigela and peonies, it now acts as the steward to several large collections of ornamentals. Several notable collections include the Explorer rose collection, the Arthur Percy Saunders peonies and the Isabella Preston lilac series. To provide a proper environment for the many plant collections the Ornamental Gardens has been subdivided into several features. These include the Macoun Memorial garden, the Lilac walk, the Rock garden, the Perennial