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Blue Sapphires | Gemstone Education

Blue Sapphires are some of the most beautiful and rare natural gemstones. Sapphire comes from the Greek word for blue stone, sappheiros, and is known as the gem of truth. Blue sapphires are blue color gemstones, and are a variety of the mineral corundum, an aluminium oxide. (Rubies are also a variety of the mineral corundum.) Contrary to popular belief, not all sapphires are blue. Sapphires can be found in several colors, including pink, yellow, and white.

The blue sapphire symbolizes loyalty and the soul. The idea that blue sapphires represent truth has been around for centuries; even today we refer to an honest person as “true blue”. In Ancient Persia, they believed the earth rested on a giant sapphire and that its reflection made the sky blue. Sapphire is the birthstone for the month of December, the gem of the fifth and 45th wedding anniversary, and Virgo’s zodiac gem.

Like rubies, blue sapphires are evaluated according to the 4 C’s— color, clarity, cut and carat. Color is most important when pricing blue sapphires. Color in natural gemstones can be broken down into three main elements: hue, saturation, and tone. Hue is the color of the gemstone. Saturation is the brightness or richness of the color. And lastly, tone is the scale of lightness to darkness of the color. Blue sapphires are found in a variety of blends of hues, tones, and levels of saturation. Blue sapphires are valued according to the intensity of their primary hue. The most common secondary hues are Purple, violet, and green. Violet and purple also often contribute to the overall beauty of the color, while green hues are undesirable. Gray is the usual saturation modifier or mask; gray lowers the saturation or brightness of the hue, having a negative effect.

Sapphires are durable (they have a hardness of 9 on the Mohs scale!) and suitable for everyday wear. To clean sapphires, scrub them using a soft brush with some mild dish soap. Make sure to go behind the stone where dust can collect!

James Allen offers an impressive collection of blue sapphires. Blue sapphires are most commonly featured in engagement and wedding rings and are especially popular among celebrities and royalty. The most famous blue sapphire engagement ring belonged to the late Princess Diana and is now worn by the Duchess of Cambridge, Kate Middleton.


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