I wonder if you will have such a question. When you look at a magazine, you will be attracted by the luxurious jewels. The color of the jewel is dazzling pink, but the name is sapphire. Why? The editor tells you, don't be foolish enough to believe that sapphire must be blue, but there is a "rainbow" waiting for you behind it. Sapphire must be blue? Definition: Sapphire is a general term for corundum gemstones of other colors in addition to red rubies in corundum gemstones. The blue sapphire that we usually use most is due to the small amount of titanium (Ti) and iron (Fe) impurities. Because it is a colored gemstone, color is the most important factor in its quality evaluation. The general status is arranged in this order: cornflower blue (optimal) > rich blue (excellent) > fresh blue (good) > light blue (middle) > very light blue or blue with gray, green (poor). Polychromaticity: Colored sapphire has dichroism, generally, dark blue/blue, blue/light blue, blue-green, blue-gray, yellow sapphire with golden yellow/yellow, orange/light yellow, light yellow/ Colorless, and so on. It can be said that sapphire covers almost all colors in the visible spectrum. According to structure Starlight effect: Sapphire can be rich in rutile inclusions. These needle-like inclusions intersect at an angle of 60°, and can be processed into a curved gemstone to display a six-shot star line. Under the illumination of the point source, the six star lines converge together, bursting at the top of the gemstone's curved surface, dazzling and dazzling. The world's largest sapphire "Star of India" Color change effect: A few sapphires have a color changing effect. The high-quality color-changing sapphire is changed from green in daylight to red or purple under incandescent light. The effect of discoloration is generally not obvious. Very few discoloration sapphires from Megumi, Myanmar and Onba, Tanzania, have a significant discoloration effect due to the presence of vanadium. The left side of the fluorescent light is blue, and the right side of the incandescent light is purple (picture from "System Gemmology") Taffeta Fabric,Taffeta Silk,Polyester Taffeta Fabric,Taffeta Silk Fabric Zhejiang Province Changxing Silk Co.,Ltd , https://www.cx-fabric.com
