Nephrite as a surface treatment. A lot of nephrite tools and amulets are known since the Early Neolithic (VII mill. BC) to the Late Chalcolithic (V mill. BC) on the Balkans (mainly Bulgaria; also in Greece, Serbia, Croatia) from two or more unknown sources - Balkan "nephrite culture". Such tools are found in the Later Neolithic of Poland (from the most probable local source Jordanów), Sardinia (Italy) (unknown source) and Switzerland (Kostov, 2005; 2013). Single or just a few finds of nephrite artifacts are reported also from some other European countries. During Neolithic times, the key known sources of nephrite jade
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