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https://glimmergirlblog.wordpress.com/2014/06/04/3-things-you-can-do-if-your-silver-is-turning-black-and-other-colours/comment-page-1/
Jun 04, 2014 · It’s one of the biggest complaints jewelers get; “Why is my silver jewelry turning grey, black or brown?” Frequently people think there’s something wrong with their jewelry when this happens, but in truth, tarnish is a natural reaction of silver metal and …
https://www.myirishjeweler.com/uk/guides/jewelry-education/why-sterling-silver-turns-black-or-green/
Cosmetics often contain chemical compounds which are harder than the jewellery itself. These compounds can rub off very tiny particles of metal which appear as jet black dust. Solution: Use a silver cloth to polish your jewellery. Remember to remove rings & jewellery while applying make-up.
https://www.myirishjeweler.com/guides/jewelry-education/why-sterling-silver-turns-black-or-green/
Cosmetics often contain chemical compounds which are harder than the jewelry itself. These compounds can rub off very tiny particles of metal which appear as jet black dust. Solution: Use a silver cloth to polish your jewelry. Remember to remove rings & jewelry while applying make-up.
https://www.guildofjewellerydesigners.co.uk/articles2/information/12-information2/1434-my-silver-has-gone-black
Silver turns black when kept in the air because it reacts with sulphur compounds such as hydrogen sulphide (H2S) present in air. The phenomenon is called corrosion and, for silver in particularly, is called tarnishing. The black substance formed is silver sulphide.
https://www.ehow.co.uk/how_4844307_silver-chain-that-turned-black.html
Jul 14, 2020 · Silver jewellery is a timeless fashion that has been around for thousands of years. Today's silver jewellery is more durable because most of it is actually sterling silver, which is only 92.5 per cent silver (the rest is copper, zinc or nickel).
https://www.onecklace.com/tips/how-to-clean-silver-jewelry-10-diy-methods/
Tarnish is a thin layer of corrosion that quickly forms over your silver jewelry, resulting in the formation of a dark coating that is undesirable to look at. Tarnish is basically the dulling of silver that typically occurs as a chemical reaction with hydrogen sulfide or sulfur present in the atmosphere.
https://www.quora.com/Why-do-silver-ornaments-jewelry-turn-into-black-color
Although atmospheric contact does contribute to discoloration of silver, it is the purity of silver that is more responsible. Jewellers mix zinc to silver and have consistently propagated that good silver will always turn black over a period of time. This is far from true and I regularly use several silver vessels (over a few kilograms).
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