Nail-pin made of mammoth tusk

This object made of a mammoth tusk in a form of a rod with a small flattened top resembles a nail in its shape. The rod has round cross-section, the same shape for its cap-pommel. The surface of the rod is ornamented with a spiral designed pattern. The surface of the nail head is smooth, without ornamentation. The nail blank was made of split tusk. After the nail blank was made, its surface was first planed and then polished. Then the ornament was applied. The lower end of the artifact has been broken off, so its shape is not exactly known, it could be either sharp or blunt.
The object could be used as a piercing tool, or as a pin, or a hairpin, or had decoration function.
This is a unique product of the Upper Paleolithic period in the territory of Northern Eurasia.