This is an ouroboros pendant.
It is inspired by Rei's supercool snake pendant from the science fiction series "Altered Carbon"!
For the real jewelry... feel you may buy it in precious Sterling Silver here
Please enjoy :)
What does Wikipedia have to say about ouroboros?
The ouroboros or uroborus (/ˌjʊərəˈbɒrəs/; from Greek οὐροβόρος from οὐρά, "tail," and -βορος, "devouring") is an ancient symbol depicting a serpent or dragon eating its own tail. Originating in ancient Egyptian iconography, the ouroboros entered western tradition via Greek magical tradition and was adopted as a symbol in Gnosticism and Hermeticism, and most notably in alchemy. Via medieval alchemical tradition, the symbol entered Renaissance magic and modern symbolism, often taken to symbolize introspection, the eternal return or cyclicality, especially in the sense of something constantly re-creating itself. It also represents the infinite cycle of nature's endless creation and destruction, life and death.