This titanium navel bar by Anatometal features a princess-cut smoke grey gem by Swarovski on the bottom of the curve, with a matching bezel-set gem on the top. 

Size:

Top gem: 4.5mm in diameter
Bottom gem: 9mm in diameter

Material:

ASTM F-136 implant grade titanium

Fit: 

Top gem internally threaded into barbell; bottom gem fixed
Available in 14g to fit most navel piercings

Suitable for:

Navel (Belly Button)