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Why isn't silver jewelry sold by weight (grams)? When silver jewelry is sold, it reflects not only the value of silver itself but also part of the craftsmanship, which cannot be measured by weight. With the advancement of craftsmanship, silver jewelry has become increasingly fashionable, such as pieces inlaid with crystals or cubic zirconia. Additionally, some silver jewelry features surface plating, which far exceeds the value of the silver itself.
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Why does silver jewelry turn black after being exposed to light for a long time? Silver is highly chemically reactive. Silver jewelry without a plating layer can heat up under light, making it easier to react with sulfur dioxide in the air, forming black silver sulfide through a chemical reaction.
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Why does colored silver jewelry fade over time? The fading of colored silver jewelry depends on the materials used in the craftsmanship. For example, gold and rose gold-colored silver jewelry have surface electroplating, and over time, the plating wears off, revealing the natural silver color. Other materials like ceramics or enamel may not fade but can oxidize. Since enamel cannot fully cover the silver base, exposed areas can oxidize, causing yellowing or blackening. To prevent oxidation, it's best to avoid exposing colored silver jewelry to air.
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Which is better, 925 silver or 990 silver? Both 925 and 990 silver have their advantages, and the choice depends on personal preference. 925 silver is the internationally recognized standard for silver jewelry, offering a balance between craftsmanship and purity. It's used to create trendy styles, with many brands like Tiffany and Pandora using 925 silver. On the other hand, 990 or 999 silver is better suited for people with sensitive skin, such as children, and is commonly used in baby bracelets or necklaces.
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Are nickel-plated jewelry items harmful to the body? Excessive nickel content is harmful to the body. There are strict regulations on the amount of nickel allowed in jewelry. People with sensitive skin should avoid wearing any jewelry containing nickel.
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How can I fix silver jewelry that has turned black? Don’t rush to use silver cleaning solution, as it contains chemicals that may corrode your jewelry. Instead, use a silver polishing cloth. There are also some household remedies, such as soaking silver jewelry in cola overnight, brushing it with toothpaste using a soft brush, or soaking it in strong tea. After cleaning, always remember to dry the jewelry with a cotton cloth.
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What's the difference between 990 silver and 925 silver?
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Silver content: 990 silver contains 99% silver, while 925 silver contains 92.5% silver, the internationally recognized standard for pure silver. 925 silver is often plated with palladium or rhodium to prevent yellowing or blackening from oxidation or sulfurization.
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Hardness: 990 silver is softer than 925 silver.
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Usage: 990 silver is typically used for simple silver jewelry, like bracelets or lockets.
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Is 18KGP imitation jewelry good? KGP refers to gold-plated or gold-filled jewelry, often seen in 18KGP pieces. These are typically made from alloy with a gold-plated surface, and are considered imitation jewelry.
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What causes silver jewelry to turn black?
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Personal body chemistry: Everyone's body chemistry is different. Some people have more acidic sweat, while others have higher sulfur content in their body fluids. These substances can cause silver jewelry to blacken.
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Air and other substances: Sulfur, nitric acid, and oxides found in air and cosmetics can corrode silver. Over time, the sulfur in the environment combines with silver to form a black layer of silver sulfide, which starts as tiny spots and eventually spreads, causing the silver to lose its shine. This is often mistaken for tarnishing.
