The amulet of the scarab has been found in Egypt in untold thousands, and the varieties are exceedingly numerous. They are made of green basalt, green granite, limestone, green marble, blue paste, blue glass, purple, blue and green glazed porcelain, etc.; and the words of power are usually cut in outline on the base.
Dulcimer, stringed musical instrument, a version of the psaltery in which the strings are beaten with small hammers rather than plucked.
Duru's definition: The set of all points in a plane that are the same distance away from some given point, which we call the center. Oliver's definition: The set of all points in 3D space that are the same distance from a center point. Carlos's definition: A perfectly round shape. Your definition needs to be much more precise.