So rubies too are sapphires with chromium impurities. At that point, it is no longer classified as a sapphire at all, but as a ruby. Once the color gets deep enough, it starts to look red-the color of rubies. ![]() The more chromium is present in a sapphire, the deeper its color. ![]() The other sapphire colors come from other mineral impurities. The pink color in sapphire comes from a mineral impurity of chromium. Interestingly enough, there are pink sapphires. Pink sapphires are often called rubies outside of the US – Credit to Wiener Edelstein Zentrum – CC-BY-SA-3.0 Most sapphires come from Sri Lanka, China, Thailand, Australia, Madagascar, East Africa, and North America. Without inclusions, you cannot have a star sapphire. These sapphires are particularly prized, and are one of the few gemstones where clarity isn’t desirable at all. There are also special star sapphires that contain inclusions that cause a special light refracting effect on the surface. You can have yellow sapphires, green sapphires, transparent sapphires, and many other shades. Sapphires actually come in a rainbow of hues, not just blue, even though sapphire is best known as a blue stone. ![]() Unless a specimen is red or a particular color of pink-orange, it is classified as a sapphire. A sapphire is classified as part of a family of gemstones called “corundum.” Corundum is a crystalline form of aluminum oxide which is naturally transparent.Īll transparent corundum is considered a gemstone, and they can come in a huge range of colors. Radiant cut blue sapphire – blue is the most popular sapphire color – Credit to Wiener Edelstein Zentrum – CC-BY-SA-3.0įirst, let’s talk about what makes a gemstone a sapphire.
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