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Marcasite brooch made from pyrite and silver. 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 ...
Jet jewellery (both vintage and new) was then to remain out of fashion until the late '70s. [51] In the '80s there was a fashion for jet beads and antique jet jewellery started to rise in value. [52] New jewellers took up the production of jet jewellery. [52]
Number Sample Colour name Description, examples RAL 1000: Green beige: RAL 1001: Beige: RAL 1002: Sand yellow: Vehicles of the Afrika Korps 1941–1943 : RAL 1003: Signal yellow: Latvian Pasažieru vilciens (Vivi) train main livery colour
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".
Examples of jewelry worn by the higher social classes include solid gold necklaces, earrings, bracelets, rings, and bulla with many variations within these classes of jewelry. Some bracelets were used without clasps (solid gold snake bracelets), while others used gold pins or small gold screws to fasten the bracelet to the wrist.
Pyrite has been proposed as an abundant, non-toxic, inexpensive material in low-cost photovoltaic solar panels. [25] Synthetic iron sulfide was used with copper sulfide to create the photovoltaic material. [26] More recent efforts are working toward thin-film solar cells made entirely of pyrite. [22] Pyrite is used to make marcasite jewelry.
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