Star Sapphires display a 6 rayed star - By light reflecting off the silky crystallizations of rutile inside called asterism.

Star Sapphires are Corundum from translucent to opaque and comes in a range of colors but the finer Blues, Reds, Green yellow orange and Padparaschas are extremely rare.

Some color-change Corundum also displays asterism, and are called Color-change Star Sapphires which are rare and sought-after by collectors and connossiers alike.

Top-quality sapphires are extremely rare. Beauty, magnificent colour, transparency, and durability are the main features. Color and asterism determines the value of a star sapphire. Highly saturated medium or dark medium tones are best. Sri Lanka is well known for the finest quality sapphires, and the largest sapphires in the world. < See list of World Famous Gems >