How to identify turquoise

With the continuous development of the times, the unseen turquoise 10 years ago has become a "red man" in the field of gemstone collection, and the investment collection team is also expanding. How to identify turquoise? To identify turquoise, see the following:

How to get rid of the stubbornness on jade jewelry

Friends who often wear jade jewelry may know that jade jewelry will inevitably stick some dust, in order to achieve the best wearing effect, this requires us to simply clean the jade jewelry, but in normal life, Many jade cleaning methods are unscientific, and natural jade

Overprinting points of polypropylene plastic bottles

Plastic bottles made of polypropylene material through injection molding process are basically outer packaging materials for light industrial products, such as cosmetic bottles, detergent bottles, drinking bottles, grease bottles and the like. These bottles are very good in weather resistance, chem