Blue chaleedony is one of the most precious gemstones in Taiwan, The most popular imitations of blue chalcedony in Taiwan market are dyed chalcedony, dyed quartzite and blue opal.
蓝玉髓是台湾最珍贵的宝石之一，它产于台湾东部海岸山脉一带。
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This process can be observed in the vibrant colours of the precious stone opal, a natural photonic crystal.
在珍贵的蛋白石中可以观察到这一颜色变化的过程，蛋白石是一种天然的光子水晶。
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Do you know the Opal? It is kind of precious stone.