This tongue ring is solid 14k yellow gold with a cubic zirconia stone on top. Metal: 14k Gold Stone: Cubic Zirconia Piercing: Tongue Stem Length: 12mm (0.5") Ball: 4mm (with stone), 4.5mm bottom ball Gauge: 16 We guarantee all materials are 100% genuine as stated above. 16 Gauge 14K Yellow Gold Tongue Barbell Piercing With Cubic Zirconia Stone