Sterling Silver & Brass pendant,
Inspired by a ball bearing(kugellager).
2 similar parts, one from Sterling Silver and the other Brass, connected and soldered together.
Fourth & Fifth pics : Brass side on front.
Diameter : approx. 20 millimeter.
2 mm width Sterling Silver curb chain.
Sixth pic : left side Deep Groove :
https://www.galbarash.com/product-page/deep-groove

Unisex.