Gemstone purchase suggestions<br>1. Sapphire color<br>Mainly in brilliant blue, strong blue and blue<br>2. Ruby color<br>It should be mainly pigeon blood red, normal red and pink.<br>3. fire color<br>More than 30% is recommended for fire color. Can 20-30% consider a small amount?<br>4. The shape mainly considers the thickness ratio<br>Recommended choice: 40-65%<br>5. In principle, the weight is more than 1 carat and less than 3 carat.<br>6. No burning and Optimization: the optimization treatment is limited to the first level (natural heating). There should be no other coloring and external addition processing.<br>
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