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1839年4月29日,在俄国乌拉尔一个祖母绿矿山上,矿工们在沿伟晶岩矿脉挖寻祖母绿时,偶然发现了一些与祖母绿不同的绿色矿物晶体,这些晶体的形状比祖母绿扁平。到了晚上,当他们把这种绿色矿物晶体放在灯光下看时,一种不寻常的现象使他们惊呆了:在白天明明是绿色,怎么现在变成红色了?这种异乎寻常的变化,使矿工们几乎不相信自己的眼睛,有的怀疑是白天看错了颜色。可是等到次日天明时,
On April 29, 1839, at an emerald miner in the Urals, Russia, miners accidentally discovered green mineral crystals different from emeralds while they were digging emeralds along the pegmatite veins. The crystals were more eclipsed than emeralds Flat. In the evenings, when they looked at the green mineral crystal in the light, an unusual phenomenon made them shocked: how bright now is the red during the day? This extraordinary change, Miners almost do not believe their eyes, and some suspect that the wrong color during the day. But wait until the next day dawn,