And a Kashmir sapphire – famous for this special inclusion type and the radiant blue – would not be as desirable without them. While single eye visible inclusions are generally not desirable in any gemstone, microscopic silk inclusions can add to the beauty of a gem. Q: But aren’t inclusions flaws that you would usually want to avoid in a gemstone?Ī: Yes and no. Blue sapphires with a sleepy appearance tend to hold their color very well and appear vibrant and powerful, even in low light, which sets them apart from sapphires without these microscopic inclusions. Sleepy sapphires tend to “glow” when hit by both natural or incandescent light, because the light is reflected back from the hundreds and thousands of microscopic inclusions inside the sapphire. Kashmir sapphires, more often than sapphires from other locations, exhibit microscopic silk inclusions and growth zoning patterns which, if evenly distributed throughout the stone, give the sapphire a velvety appearance, in the gem trade often referred to as a “sleepy” character.
Q: What makes a Kashmir sapphire so special?Ī: It’s all about the color! The typical Kashmir blue is a highly saturated (vivid) blue with a minute tinge of purple.
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