♪(ᴖ◡ᴖ)♪ Hey, so... the post has a k18 stamp, but I think the hoop part is just regular metal, with only the post being k18 ( ´ ▽ ` ) The other ruby one, the heart that dangles, has all k18 fittings (//∇//)... but it doesn't have any backs... (=^▽^)σ...٩( ᐛ )و Wait a minute? ✌︎('ω'✌︎ ) I found some regular metal backs in the time box, so I put them on! So, you know... (*^▽^*) the backs aren't k18, okay? Look at the pictures! (=^▽^)σ