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蓝宝石和红宝石是一对孪生兄妹,它们都是色美的宝石级刚玉。区别在于它们在各自的生长过程中捕获的致色元素不同。红宝石捕获了铬,所以呈现红色、粉红色。蓝宝石捕获的是铁和钛。由于铁和钛在每个宝石中的含量和比例不同,所以呈显出多种颜色,有蓝色、绿色、黄色、紫色、乃至无色。为此,蓝宝石是除了红色红宝石之外各种颜色的宝石级刚玉。当前市场上流通的蓝宝石和仿蓝宝石的品种较多,除不同产地的天然蓝宝石外,还有热扩散法优化蓝宝石、合成蓝宝石以及与蓝宝石相似的天然蓝色宝石。它们的外观十分相似,需要认真加以鉴别。
Sapphires and rubies are a pair of twin siblings, all of which are sapphire-rich corundum. The difference is that they capture different chromogenic elements during their growth. Ruby caught chrome so rendered red and pink. Sapphire caught iron and titanium. Due to the different amounts and proportions of iron and titanium in each gem, many colors appear, with blue, green, yellow, purple and even colorless. For this reason, sapphires are gem-grade corundums of various colors other than red rubies. There are more varieties of sapphires and sapphires circulating on the market. In addition to natural sapphires of different origins, there are thermal diffusivity optimized sapphires, synthetic sapphires and natural blue gems resembling sapphires. Their appearances are very similar and need to be carefully identified.