Sapphire comes from the Greek word for blue, sappheiros, and this gem provides the most beautiful blues of the gem kingdom. Sapphire is the gem of truth. The name sapphire is derived from the Latin word "saphirus" and the Greek word "sapheiros," both meaning blue. Since the word sapphire is synonymous with the color blue, many people don't realize that sapphire comes in other colors, like pink, yellow, and white. Sapphires were believed to have special protective powers, such as preventing envy and protecting the wearer from poisoning. In addition, people believed that sapphire had medical healing properties, such as the ability to cure colic, rheumatism, blindness, and mental illnesses. Sapphire symbolizes fidelity and the soul. In ancient times, a gift of a sapphire was a pledge of trust and loyalty. This tradition makes sapphire a popular choice for engagement rings.Pink sapphire is even rarer than blue: in some ways it has more in common with ruby than the other colors of sapphire. Gem experts often debate where ruby ends and pink sapphire begins, since pink is really just light red.Yellow sapphire deserves more recognition. Its sunny color is an instant mood-enhancer on the grayest day. Rare and beautiful, yellow sapphire complements yellow gold and takes center stage set when contrasting against white gold and diamonds.