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925 silver jewelry manufacaturer How to identify and buy emerald jewelry?

Diposting di oleh Kingjy

Natural emeralds can be divided into two types:

(1) American type: includes emeralds produced in Colombia, Brazil and the United States. It is characterized by low refractive index, small specific gravity, ultraviolet (long wave) irradiation and fluorescence, and the color turns red when observed with Charles filter.

(2) African type: emeralds produced in Zimbabwe, South Africa, Zambia, Tanzania, India, Pakistan and other places in Asia are characterized by high refractive index, high specificity, and generally do not emit light under ultraviolet light. The color filter observation is still green or Gray green. Karena itu, the statement in some books and magazines that “observed from the Charles filter, if the gem is green, it must not be emeralds, because the emeralds seen in the mirror should be red.” , So it is one-sided.

Selain itu, the low-grade emerald egg-shaped light body ring noodles sold in the domestic jewelry market or trade fairs are processed from emeralds produced in a certain place in Yunnan, my country. Umumnya, they have poor transparency and most of them have microcracks (in order to cover up defects, Commonly used cedar oil or synthetic liquid epoxy resin impregnation). But its low price can meet the requirements of some low-end consumers.

 

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Mari kita mulai : mo@kingjy.com

 

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