Diamond is the only one of the highest hardness sets, strong index of refraction and in the integration of high-dispersive gemstone varieties, are unparalleled in any other gem varieties.
钻石是唯一一种集最高硬度，强折射率和高色散于一体的宝石品种，任何其它宝石品种都是不可比拟的。
Diamond is the only one of the highest hardness sets, strong index of refraction and in the integration of high-dispersive gemstone varieties, are unparalleled in any other gem varieties.
钻石是唯一一种集最高硬度，强折射率和高色散于一体的宝石品种，任何其它宝石品种都是不可比拟的。
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