Gemstone irradiation produce mixtures of blue and yellow-to-brown colors, so heating is required as an additional procedure to remove the yellowish color. In some cases, the new colors induced by artificial irradiation may fade rapidly when exposed to light or gentle heat, so some laboratories submit them to a "fade test" to determine color stability. Sometimes colorless or pink beryls become deep blue upon irradiation, which are called Maxixe-type beryl. However, the color easily fades when exposed to heat or light, so it has no practical jewelry application. Gemstone irradiation The gemstone irradiation is a process in which a gemstone is artificially
Aquamarine Fukushima can see the top of the main tank. Aquamarine Fukushima The aquarium opened on 15 July 2000. The nickname "Aquamarine Fukushima" was selected in 1998 from a total of 4,722 applications. The 2011 Tōhoku earthquake and tsunami on 11 March 2011 resulted in power being cut off to the aquarium. Many fish died, but some marine mammals and sea birds were subsequently transferred to Kamogawa Sea World, to the south, Ueno Zoo in Tokyo, Tokyo Sea Life Park, Mito Sea Paradise, and New Enoshima Aquarium. Although the main building sustained only minor damage, outside pools were washed away, and there