"au" is an acronym for gold, and "au750" stands for 75% gold, which is what we call 18k gold. au750 has a variety of different colors and high hardness, so it can be made into a variety of beautiful craft gold or color gold jewelry.
au750 is 75% gold and 25% of other metals mixed, so there are a variety of different colors, the market is more popular is white, rose, yellow, blue, black, purple and so on.
Since au750 is not a pure precious metal, the price of au750 is generally not calculated according to the weight, generally when we buy au750 metal jewelry, its price is based on the style and workmanship, and very few merchants calculate the price according to the weight.
au750 jewelry worn for a long time, there will be fading, black phenomenon, so in daily life to avoid high volatile detergent, perfume or salt relatively large seawater or swimming pool water contact, it is best to regular care and cleaning. When not wearing, do not put it together with other metal jewelry, so as not to cross color, affecting the purity of both.