This stunning Natural Blue Sapphire is a 9x6mm oval cut Ceylon Blue 6CT AGI certified sapphire set in a 925 Sterling silver size 7.75ring setting. We in the U.S. use different Gemological institutes to determine authenticity of gemstones so I wanted to test the sapphire - see video (photo). This gemstone was set in India. The ring setting is considered for male or female. All listings stated 925 Sterling Silver are stamped 925 and authentic Sterling silver. Natural and genuine gemstones are mined gems, NOT lab created. This item will come with a gift box or a travel Jewlery box. Let me know your preference at checkout. I ship within one business day of sale. Shipping from Southeast Louisiana.