Opal is a gemstone with a color-changing effect. Pliny, a famous natural scientist in ancient Rome, once described it as follows: “オパールの石の上に, you can see the flame of ruby, アメジストのような色の斑点, and the emerald sea. 緑, the five colors are colorful, blending together, and beautiful.” 古代中国では, オパール […]
