Although popularly associated with the color blue, sapphires include all non-red colored corundum gems. (Sapphires may contain a mix of chromium, titanium, and iron traces). All other varieties of corundum, anything not red, are classified as sapphire. The presence of chromium is largely what makes a corundum gemstone red. These impurities create the wide range of colors found in corundum crystals: gray, brown, yellow, green, blue, purple, red, … and pink. Scientifically, rubies and sapphires are simply varieties of corundum, a crystalline form of aluminum oxide (Al 2O 3), with impurities or trace elements such as iron, titanium, or chromium. In October 2016, the US lifted its embargo). (NOTE: All That Glitters purchased all its Myanmar rubies before the 2008 embargo on importing Myanmar ruby and jadeite into the United States. After seeing some of their color descriptions of spessartite, rhodolite, and other gemstones certed by this lab, we are not concerned that they used the term Pink!" © All That Glitters. Think the difference between red and pink is clear-cut in gemology? The description of this beautiful 2.04-ct Burmese ruby begins: "Color is a great Ruby Red, though the cert indicates a Pink Red. In fact, there is no general agreement on where to draw the line, but that line is certainly pink.
What's the difference between rubies and pink sapphires? According to one old joke, that depends on whether you're the buyer or the seller.
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