Opal is also known as Opal, English is Opal, originated from the Latin Opalus, meaning "the beauty of the gem." Ancient Roman natural scientist Pliny once said: "On an opal stone, you can see the ruby ​​flame, the amethyst-like stains, the emerald green sea, the colorful, seamless, beautiful." As early as the Roman Empire, Opal was known and of great value. According to Pliny, the Nunnery of the Senate has a very beautiful opal. He is very fond of it. At that time, the ruler Anthony let him give it, otherwise he will be exiled. As a result, Nonining can choose to exile and refuse to put it. Opal dedicated to Anthony. Opal not only has beautiful and colorful spots, but also from different angles, these spots will also show a changing color, like a swimming flame. And the beauty of each opal is not the same, it is unique. A good opal stone produces a flame-like appearance that has only been found in very few substances and has not been found in other gemstones. This phenomenon of flame-like appearance caused by diffraction of light is called color change. This is the identification feature of opal stone and its main attraction as a gemstone. Disposable Gauze Mask Nonwoven Sms Nonwoven,Gauze Mask Nonwoven,Disposable Non Woven,Non Woven Fabric Material Zhejiang Wangjin Nonwovens Co., Ltd , https://www.wangjinnonwoven.com