10k Tri-Colored Gold Post Earrings, Yellow Gold, White Gold & Rose Gold sections. At 15mm, these are full sized earrings, not tiny or dinky small like so many gold earrings on here. They are light weight and comfortable to wear. Gold stamp on earring stem and push backs themselves . Disclaimer: I am not a professional jeweler nor do I have any testing equipment or capabilities. The information provided is information told to me or from my own observations. The information is true to the best of my knowledge.