Green Sapphire is a Gemstone variety of corundum. The Birthstone for the month of May. Green Sapphire is soothing to the eyes and is known as a stone of tranquility. Green Sapphires of high quality are rare, such as ones that are well-cut, offer rich color, and have minimal inclusions.Green is a rare color for a Sapphire.
Highly saturated medium or medium dark green and blue-green tones are best, green and blue-green sapphires which are too dark or too light are worth considerably less.