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
Forms of juggling Some performers will mix various objects of widely differing weights, sizes, and shapes, requiring them to adjust their throwing force for each object. Instead of throwing balls, a juggler may roll them over the hands and body. Usually “crystal” balls (actually acrylic or plastic) are used. There are two distinct forms. A. Rolling one or two balls all over the hands, arms and body. B. Controlling three to eight balls, revolving them in stacks in the palms of the hands. Both forms often use the idea of "isolation". The impression is given of one ball being fixed in space and