This titanium nipple bar by Anatometal features two princess-cut 3mm clear gems by Swarovski set on either side of a straight barbell. 

Material:

ASTM F-136 implant grade titanium

Fit: 

One gem is fixed, the other is internally threaded into the barbell
Gems are counter-sunk to ensure they line up parallel to each other and forward-facing
Available in 14g to fit most nipple piercings
Available in several lengths to accommodate for individual anatomy

Suitable for:

Nipple