Core Viewpoint - The rise of "sand gold" jewelry, which mimics the appearance of real gold but is significantly cheaper, has gained popularity in the market, raising concerns about its actual composition and potential health risks [1][2]. Group 1: Product Composition and Standards - "Sand gold" refers to a natural mineral containing gold, typically with a gold content of about 5%, but most products marketed as "sand gold" are actually copper-nickel alloys with no gold content [1][2]. - Many sellers apply a very thin gold plating (usually less than 0.05μm) to these alloys, which does not meet the national standard for gold-plated jewelry as per GB/T 32022-2015 [1][4]. Group 2: Health Risks and Consumer Awareness - The thin gold layer on "sand gold" jewelry can easily wear off due to friction and sweat, leading to aesthetic issues and potential health risks from nickel release, which can cause skin allergies [2]. - The nickel release limits set by GB 28480-2012 indicate that products for body piercings should have a nickel release of less than 0.2μg/(cm²·week) during healing and less than 0.5μg/(cm²·week) for long-term skin contact [2]. Group 3: Consumer Guidance and Business Practices - Consumers are advised to understand the differences between inexpensive "sand gold" and genuine gold or compliant gold-plated jewelry, and to request authoritative testing reports to ensure compliance with safety standards [3]. - Businesses are encouraged to adhere to standards, clearly disclose the material composition, gold content, and plating thickness of "sand gold" products to avoid consumer disputes and protect brand reputation [3].