Of course, Lao Fengxiang's is good, and the old temple's is also good. Gold generally doesn't turn black in a week. If it turns black, it is suspected that the surface is gold plated. Because the gold plating is oxidized. If it turns a little black over time, it means that this gold is not mine gold, but placer gold. The difference between ore gold and placer gold is that ore gold is extracted from ore, while placer gold is scoured from sea sand. Although both belong to gold, it is obvious that ore gold is better than placer gold.

Diamond jewelry is the only brand on China's jewelry quality list, and it is a well-known brand of Chinese jewelry quality awarded by China Gemstone Association. All its jewels and jade are provided with quality appraisal certificates by China Gemstone Association, and all its pure platinum is provided with quality inspection certificates by the National Nonferrous Metals Research Institute and the National Jewelry Quality Supervision and Inspection Center. It is the largest national jewelry brand in China. With the idea of selling jewelry, spreading jewelry culture, guiding people's understanding of "beauty" and looking for "jewelry that is not the most expensive, but the most touching and suitable for them", Diamond Jewelry Store spreads the true feelings of the world. Laofengxiang is the only century-old shop in China that has been handed down from a century and a half ago.

Shanghai Laofengxiang Co., Ltd. evolved from Laofengxiang Jewelry Store and was established in 1848. The originality of its trademark "Lao Fengxiang" also stems from the font size of Lao Fengxiang jewelry store. Zhou Dasheng Company insists on unique market positioning and product positioning: Chow Tai Sang Jewelry is atmospheric, elegant and fashionable, with subtle and elegant oriental charm and modern fashion taste. Chow Tai Sang Jewelry has built a leading brand in the domestic jewelry industry through high-quality products, thoughtful after-sales service, fashionable design and elegant brand image. The "Zhou Dasheng" brand diamond, jade jewelry and other jewelry products managed by the company have won wide praise and trust from consumers by virtue of their extraordinary design concept, noble and elegant inner temperament and perfect and unique exquisite craftsmanship.

Hong Kong Aihengxin International Jewelry (Group) Co., Ltd. was established in August 1976. Is a collection of gold, platinum, K gold, inlaid jewelry production, processing, wholesale, retail and self-import and export in one of the large jewelry enterprises. Companies adhering to the "integrity management, Excellence" business purpose, "customer satisfaction, our pursuit" as a service commitment, with novel styles, superb technology, high quality, reasonable price, excellent service, reputation first marketing strategy, now, Aihengxin Company has won the honorary title of "China Famous Trademark".