[披着锂云母的托帕石 @ National Museum of Natural History] Topaz with lepidoliteMost topaz come from pegmatites. This large crystal capped with lepidolite is naturally blue. This is rare in nature, however, and most blue topaz is man-made by irradiat......

[披着锂云母的托帕石 @ Nationa...

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转采于2017-07-19 15:54:34

[披着锂云母的托帕石 @ National Museum of Natural History] Topaz with lepidoliteMost topaz come from pegmatites. This large crystal capped with lepidolite is naturally blue. This is rare in nature, however, and most blue topaz is man-made by irradiat......

行动迟缓脑电波有点萌