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www.finishing.com/118/26.shtml

Q. Why does precious metals such as gold, when rubbed across a face with ... accidentally rubs her ring against her face, it will leave black marks there? .... It must have something to do with the oils from your pores, which are gone .... Copper and silver in low karat gold alloys can tarnish, leaving a dark green-black mark. 2.

www.finishing.com/337/58.shtml

Skin-blackening reaction to 14K gold rings. ... I will follow your suggestions, and hope to have smudge free fingers in future. ... my hands thoroughly after leaving the tub that my fingers don't turn black. .... Mark H [last name deleted for privacy by Editor] ... This is the first place I have run across the idea that it has to do with a  ...

www.yatesjewelers.com/why-does-my-gold-ring-turn-my-finger-black.html

Have you ever had a gold ring that turned your finger turned black or green? ... ( Remember, 14K gold means the ring has 58% of pure gold and 42% of non gold  ...

www.livestrong.com/article/215875-what-causes-skin-discoloration-from-gold

Aug 16, 2013 ... But there are certain conditions under which gold jewelry can affect... ... If your skin turns green from gold jewelry, remove the jewelry and wash ... Nickel reacts with skin similarly to copper, but it turns black instead of green.

www.leaf.tv/articles/how-to-check-for-anemia-with-a-gold-ring

Anemia is usually described as an iron deficiency, though it can also be due to a lack of hemoglobin in the blood. The hemoglobin carries oxygen to tissues ...

msgboard.snopes.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=42;t=000092;p=0

My girlfriend believes that rubbing a gold ring on your skin will indicate if ... forehead usually leaves very dark grey marks, where the arm is usually light). .... Maybe it has something to do with baby oil, I know she puts on lotion ...

jewelry.about.com/od/jewelrymetals/a/skin_reactions.htm

May 15, 2016 ... Has gold and other jewelry ever left greenish or black marks on your skin? It's happened to most of us at least once or twice. Even though some ...

www.refinery29.com/jewelry-turning-skin-green

Sep 9, 2014 ... Just because your favorite ring stains your finger, that doesn't mean you have to get rid of it. ... Then, when you take it off, it leaves a green stain in its place. ... amount of gold jewelry — can oxidize when it comes in contact with skin. This causes tarnishing and can leave you with a dark-green or black stain.

www.overstock.com/guides/why-some-rings-discolor-your-finger

Some rings can turn your finger black or green, and though there are many ... Gold is impervious to most chemicals, but chlorine will eat away at gold. ... The acid in your skin can also cause a reaction with some metals, which can result in ... If these tips aren't enough to prevent your rings from leaving a stain on your finger, ...

www.encognitive.com/node/4818

Q. When I swipe a gold ring down the side of my face, it leaves a black mark. A friend told me that means I'm iron- deficient. Is this true? A black mark from gold?