This is a stunning late 20th century vintage large solid 18 K yellow gold men’s natural blue Star sapphire cabochon ring. Carefully examined and tested here I determine gemstone carat weight by comparing with a similar loose gemstone which I have many loose star sapphires, this gemstone measures 12.5 mm x 10 mm and it is 9 mm deep making it at least 10.0 cts. It has a very mild 6 ray star that you don’t see unless it’s in the sunlight otherwise it has amazing color and natural inclusions that enhance its beauty. I did shine a flashlight on it in my photo booth to expose the star as a star sapphires are very hard to photograph and this ring is much prettier than the photos. It weighs 13.8 grams and it is around size 12.25 – 12.5 that can easily be sized by a jeweler. The top of the gemstone sits 11.5 mm off the finger and the ring is 15.7 mm wide north to south on the top as it tapers to a thick and sturdy band that is marked 750 on the inside. 750 is the numerical equation for 18 K gold. Please study the photos this is a big beautiful ring not necessarily for a man and it is in excellent vintage condition ready to be worn and admired. Please know all items have been carefully and professionally examined and I have attempted to describe any defects or issues the item might have. I’m very sorry but all of the ring boxes etc. Are for display purposes only and not included, thank you everybody for your continued support and please feel free to message me anytime. Brian at Forgotten Treasures.