![]() Durability is important because gemstones are susceptible to chipping. ![]() Lab created Sapphire corundum is a synthetically produced crystal whose with hardness on the Mohs scale that is second to diamond, making it extremely durable. ![]() However, the term Sapphire encompasses all other gem varieties and colors of Corundum as well, except Ruby which is the red variety of Corundum, which has its own name. In the gem industry, sapphire without any color prefix (such as blue sapphire) refers to the blue variety of the mineral Corundum. They are a highly desirable gemstone due to their beautiful royal blue color, hardness (second only to diamonds), durability, and luster (sparkle from light performance within the gemstone). Sapphires are the most valuable and rarest blue colored natural gemstones.
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