别买、别戴！这种“大金镯子”，重金属严重超标

Core Viewpoint - The article discusses the rise of "sand gold" jewelry, which resembles gold but is much cheaper, and questions the authenticity and safety of these products [2][3][12]. Group 1: Market Overview - "Sand gold" jewelry has gained popularity as a low-cost alternative to gold due to rising gold prices, with prices ranging from a few hundred yuan to over a hundred yuan in online sales [2][3][12]. - Many merchants claim that "sand gold" products are made from materials that do not fade and can withstand fire, leading to consumer interest [3][12]. Group 2: Material Composition - "Sand gold" is described as a mineral containing about 5% gold, formed from weathered gold-bearing rocks mixed with sand [5]. - However, most merchants are vague about the actual materials used in "sand gold" jewelry, often failing to confirm the presence of gold [5][8]. Group 3: Production and Pricing - The base material for these jewelry pieces is primarily brass, which is then electroplated with a thin layer of gold (0.05 microns), giving it a gold-like appearance [10]. - The production cost of these brass-plated items is around 10 yuan, but they are sold for approximately 40 yuan at markets and can reach over a hundred yuan online due to marketing strategies [12][13]. Group 4: Health Concerns - Testing has shown that many "sand gold" pieces are made from copper-nickel alloys, which can release nickel at levels exceeding national safety standards, posing allergy risks to consumers [15][17]. - Nickel is a common allergen, and there have been reports of consumers experiencing allergic reactions after wearing "sand gold" jewelry [17]. Group 5: Legal Implications - There are legal concerns regarding the false advertising practices of some merchants selling "sand gold" jewelry, which could lead to penalties under Chinese law for misrepresenting products [19].