From Africa Approximately 5mm Approximately 1.33ct (for both) I think it's very beautiful, with no noticeable inclusions or scratches. It has a strong sparkle, and the reflection from a smartphone light is too strong to photograph well... but it's too dark without a light, so I'm sorry... I think many people mistake it for cubic zirconia! It's a natural stone, not artificial or synthetic. It may be inferior to diamonds or moissanite, but it sparkles quite a bit lol Stamped k18 Yellow gold No backings Silicone backings will be included. *If you prefer k10, I have double-lock backings listed separately. I have a dog. #nekoishinumaaccessories