与澳大利亚的欧泊相比，这些中国欧泊（蛋白石）有着不同的色彩和外观。
Sometimes called protein stone , this China opal has a different colour and appearance when compared with Australian opal .
澳大利亚蓝色调欧泊的变彩效应与二氧化硅球粒间隙的关系
The Correlation between Play-of-Color Effect and SiO_2 Cavities Size of Australian Blue Opal
澳大利亚欧泊