Solid 18k Yellow Gold 1.5mm (0.015 cttw) Genuine Diamond Nose Stud Bone 18 Gauge 1/4" Gauge size 18 gauge; 1 millimeter Length 1/4 inch; 6 millimeters Nose stud with natural diamond in a prong setting Solid 18k white gold nose ring with polished finish Straight nose bone can be worn in either nostril