Ruby origin distribution

As we all know, the ruby ​​value assessment also pays attention to "born". Although the ruby ​​origin is not in the "4C" standard, the industry is used to the same quality. The ruby ​​value of the famous place i

Turquoise optimization processing method

There are too few high-quality turquoises, and now the market will find ways to upgrade natural turquoise, which is generally accepted by the jewelry industry. So what are the turquoise optimization methods? Dyeing The dyed turquoise color is not natural. The dyed turquo