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Pyrite's metallic luster and pale brass-yellow hue give it a superficial resemblance to gold, hence the well-known nickname of fool's gold. The color has also led to the nicknames brass, brazzle, and brazil, primarily used to refer to pyrite found in coal. [8] [9] The name pyrite is derived from the Greek πυρίτης λίθος (pyritēs ...
Sperrylite on chalcopyrite with magnetite, Oktyabersky Mine, Norilsk.Field of view 2.2 cm. Sperrylite is a platinum arsenide mineral with the chemical formula PtAs 2 and is an opaque metallic tin white mineral which crystallizes in the isometric system with the pyrite group structure.
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.
A Washington Quarter from 1947 in circulated condition is worth between $4.65 and $7.25. However, those in pristine, uncirculated condition typically sell for $10,000 or more. 1943-D Lincoln ...
Pyrite, which is made up of iron sulfide, made up more than 10 percent of the sulfur production in the 1920s, but declined slowly, until the last pyrite mining in the ...
After reaching a net worth of more than $486 billion in December, Elon Musk’s wealth has sunk below $400 billion for the first time in 2025. Tesla—where Musk derives about 60% of his wealth ...
Donald Trump wanted to tap America's oil reserves to power the economy in his administration—but it's not his call to make (Bonnie Cash/UPI/Bloomberg - Getty Images)
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".