From Modern Mood. Solid 14k double gemstone design is 4mm x 2.1mm. This is a great look for all kinds of placements; looks fabulous on a nose, tragus, helix piercing and more. Genuine opal: 0.05ct. Genuine Diamond: 0.01ct. This threadless end will fit on any size of our implant grade titanium threadless labret posts, found here. The pin on this piece will be pre-bent to ensure a secure fit.