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Marcasite jewellery is jewellery made using cut and polished pieces of pyrite (fool's gold) as gemstone, and not, as the name suggests, from marcasite. [1] Both pyrite and marcasite are chemically iron sulfide, but differ in their crystal structures, giving them different physical properties. Pyrite is more stable and less brittle than marcasite.
Marcasite reacts more readily than pyrite under conditions of high humidity. The product of this disintegration is iron(II) sulfate and sulfuric acid. The hydrous iron sulfate forms a white powder consisting of the mineral melanterite, FeSO 4 ·7H 2 O. [13] This disintegration of marcasite in mineral collections is known as "pyrite decay".
At the time when the term became common in jewelry making, "marcasite" referred to all iron sulfides including pyrite, and not to the orthorhombic FeS 2 mineral marcasite which is lighter in color, brittle and chemically unstable, and thus not suitable for jewelry making. Marcasite jewelry does not actually contain the mineral marcasite. The ...
Another vintage jewelry piece that could be worth a lot is the French Haute Couture Honeycomb from the 1950s. This piece alone could be worth $3,000 or more, according to Timothy Connon, ...
Pieces of jewelry that are at least 50 to 100 years old and in good condition are also highly... Vintage seems to always be in fashion, but clothing isn't the only thing that's highly sought after ...
From classic Cartier jewelry and other 14k icons to direct-to-consumer disrupters, these jewelers will brighten your day. Shop the best fine jewelry brands now.
Conway report in 2011 "Most marcasite jewelry today is actually faceted hematite." That may be true of high end merchandise that I never see. But there is also a thriving commercial trade in dark gray 'synthetic marcasite' for cheap jewelry, at prices like a few cents per small round stone, in lots of 1,000, which you can easily find on line.
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