The Celestia has 1 1mm diamond set in 14k gold.

• Available in 14k yellow, white and rose gold
• 6.5mm x 5.4mm
• Works with threadless barbells, flatbacks & curved barbells
• Titanium pin for extra strength
• Great for nostrils, ears, lip piercings, etc.
• Sold individually 
• Post is not included, they are available here: Threadless posts