Opal is a gemstone with a color-changing effect. Pliny, a famous natural scientist in ancient Rome, once described it as follows: “On an opal stone, you can see the flame of ruby, 자수정 같은 색 반점, and the emerald sea. 녹색, the five colors are colorful, blending together, and beautiful.” 고대 중국에서는, 오팔 […]
