The experiments show that the color of the iceland spar can be changed when heated to a certain temperature , that is , light yellow iceland spars will fade when heated to 360 - 370 , while dark yellow iceland spar will fade at 440 - 450 , brownish yellow iceland spar at 460 - 470 ; and the color of light purple iceland spar can be removed when heated to 390 - 400 , while the color of deep purple iceland spar can be removed at 440 - 450 , deep reddish purple iceland spar at 460 - 470 . on base of the u - v absorption spectrum , we find that the u - v absorption spectra of the faded iceland spars are paralleled to the x axis , the transmittance of them are also greatly improved 实验表明，冰洲石在加热到一定温度时颜色会发生变化：浅黄色、深黄色和褐黄色冰洲石分别在360 - 370 、 440 - 450和460 - 470完全褪色；浅紫色、深紫色和深紫红色冰洲石分别在370 - 380 、 440 - 450和460 - 470时完全褪色。通过对褪色后冰洲石进行紫外-可见光吸收光谱测试表明：完全褪色后的冰洲石在紫外-可见光的吸收光谱上表现为一条近平行x轴的直线；紫外、可见光区的紫区的光透过率有了很大了提高。
