The color for the 65th wedding anniversary is sky blue. The gemstone associated with the 65th wedding anniversary is the star sapphire. Many believe that the star sapphire stands for devotion.

The star effects in a star sapphire are made by tiny inclusions. These inclusions in the stones create reflections of light that form the appearance of the star.

The most valuable star sapphire is the Star of India. It is also the largest, at 563.33 carats in size. The Star of India resides in the New York Museum of Natural History. This gem was formed approximately two billion years ago.