High-quality sapphire should be transparent. When you turn the polished sapphire, you can see dancing blue light.

It is best to observe sapphire with naked eyes under white light, not with strong light, because the blue color seen with naked eyes under white light is the most correct. High-quality sapphire should be transparent. When you turn the polished sapphire, you can see dancing blue light. It is best to buy sapphire without cracks and defects, and sapphire with obvious cracks is of little value. From the color point of view, purplish sapphire in indigo is the most precious. In addition, if buying sapphire jewelry is particularly expensive, it is best to ask for an appraisal certificate, which is a common practice in the international jewelry industry.