對, strong blue I color
根據GIA講法: 過往幾十年, 通常做測試既石中都有25-35%係有不同程度的營光. 但在這有營光既石中只有10%係會影響外觀(即medium, strong blue or very strong blue). 一般超過95%顯示既色係藍色, 只有很少數係呈黃色, 白或其他色), 少於0.2%既有營光石係呈奶白或矇
GIA studies show that, for the overwhelming majority of diamonds, the strength of fluorescence has no widely noticeable effect on appearance. In many instances, observers prefer the appearance of diamonds that have medium to strong fluorescence.
"Fluorescence refers to the strength, or intensity, of the diamond's reaction to long-wave UV, which is an esstial component of daylight."
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