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
Two Rock , north-northeast of Fairy Castle on the slope leading to Three Rock. Two Rock can be reached via the Coillte-owned forest recreation areas of Ticknock, Kilmashogue and Tibradden, which are managed by the Dublin Mountains Partnership. The mountain is traversed by the Dublin Mountains Way hiking trail that runs between Shankill and Tallaght while the Wicklow Way hiking trail runs to the west of the summit. Two Rock Two Rock (; archaic: Black Mountain; "" ()) is a mountain in Dún Laoghaire–Rathdown, Ireland. It is high and is the 382nd highest mountain in Ireland. It is the highest point of