The Sphere With Ruby Necklace in Silver from Title of Work 

Details
this sterling silver necklace features a spinning orb pendant housed in a half sphere with a hidden ruby suspended by a sterling curb chain. it is constructed in our lower east side studio using reclaimed sterling silver.

MATERIALS: sterling silver / ruby
COLOR: silver / red
CONSTRUCTION: hand-made
ORIGIN: new york city
.5" pendant 
Internal orb moves on hinge.