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 (novel) from her six sisters, and is suffering from the chlorine in the pool. Hailey and Claire advise Aquamarine to return to the ocean, however she refuses, because of her new attachment to Raymond. Claire and Hailey read books that contain information pertaining to marine life-forms, trying to find an answer to Aquamarine's troubling conditions. They learn that mermaids cannot survive on land for more than a week. The necessity of returning Aquamarine to the ocean is thus made more urgent. In order to persuade Aquamarine to return to her home, Hailey and Claire arrange that she will spend one evening