周生生足金挂坠戴一天就被刮花，检测后发现含铁、银、钯

Group 1 - A customer in Guangdong reported that a gold pendant purchased from Chow Sang Sang was scratched and showed white marks after just one day of wear, raising concerns about the gold content [1][2][4] - The customer conducted multiple tests on the pendant, revealing significant discrepancies in gold content across different points, with the highest purity at 99.99% and the lowest at 64.37%, a difference of 35.62% [10][11] - Chow Sang Sang initially denied the quality issue but later offered a return option out of goodwill, suggesting that the customer could have the pendant tested at a recognized authority [12][15] Group 2 - Regulatory authorities have intervened in the dispute, advising that the pendant be sent to a third-party professional institution for formal appraisal to ensure the accuracy and objectivity of the results [13][15]