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
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