Comparatively little is known of their magico-religious world, although the clues that we have are tantalising. The art forms for which the Olmecs are best known, the monumental stone heads weighing up to forty tons, are generally assumed to pertain to some form of kingly leader or possibly an ancestor. The smaller jade figures and celts of which this is one are believed to be domestically or institutionally based totems or divinities. The quality of production is astonishing, particularly if one considers the technology available for production, the early date of the pieces, and the dearth of earlier works upon which the Olmec sculptors could draw. Some pieces are highly stylised, while others demonstrate striking naturalism with interpretation of some facial features (notably down-turned mouths and slit eyes) that can be clearly seen in the current figure.