1. Sapphire is one of the four precious gemstones. The other three are diamond, ruby, and emerald.
2. While sapphire may be recognized for its blue color, it actually comes in a variety of colors including pink, orange, green, black, and even colorless.
3. Sapphire is made from a mineral called corundum, the same mineral that forms ruby. If its formation is red, it’s ruby. If it’s any other color, it’s sapphire.
4. Corundum ranks 9th on the Mohs Scale of Hardness, making sapphire and ruby the second-hardest gemstones after diamond.
5. Unlike in diamonds, inclusions do not automatically decrease a sapphire’s value. On the contrary, some inclusions are seen as an addition to the beauty of the stone as long as they don’t affect the color and overall look of it.
6. One factor that plays a big role in grading a sapphire is its cut, determining the color and brilliance of the stone.
7. Some sapphires change color when exposed to light.
8. Though highly rare, some sapphires’ inclusions form the shape of a star, in which case the gemstone becomes a “star sapphire.”
9. Padparadscha, a Sinhalese word which refers to the lotus flower, is a pinkish-orange sapphire and is considered the stone’s rarest color.
10. Synthetic sapphire is used in the manufacturing of the Apple Watch screen to increase its resistance to scratches.
Rubies are red, emeralds are green, diamonds are (in most cases) transparent, but sapphire enjoys a variety of colors suitable for all tastes and interests. Thanks to its charm and exoticness, the gemstone continues to satisfy, delight, and make some of the finest and most elegant jewelry.