![]() Saturation refers to the vividness or brightness of the hue, and tone is the lightness to darkness of the hue. Gemstone color are grading in terms of hue, saturation, and tone. It is as the insulating substrates of very special-purpose solid-state electronics. ![]() Wristwatch crystals and movement bearings. We also use in some non-ornamental applications. The second hardest mineral, after diamond at 10. Because of the remarkable hardness of sapphires. They also can be synthetics for industrial or decorative purposes in large crystal boules. This variety in color is due to trace amounts of elements such as iron, titanium, chromium, copper, or magnesium.Ĭommonly, we cut and polish natural blue sapphires as gemstones and worn it in jewelry. Pink colored corundum may be either classified as ruby or sapphire depending on locale. The only color which sapphire cannot be is red.Īs a red color corundum is a ruby, another corundum variety. It is typically blue, but natural fancy gemstones also occur in yellow, purple, orange, and green colors, parti sapphires show two or more colors. Natural nlue sapphire is a precious gemstone, a variety of the mineral corundum, an aluminum oxide (α-Al2O3). Are synthetic sapphires worth anything?. ![]() How can you tell a good quality sapphire?.How can you tell if a blue sapphire is real?. ![]()
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