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2. Marcasite jewellery - Wikipedia

   en.wikipedia.org/wiki/Marcasite_jewellery

   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.

3. List of watch manufacturers - Wikipedia

   en.wikipedia.org/wiki/List_of_watch_manufacturers

   This list is a duplicate of Category:Watch brands, which will likely be more up-to-date and complete. Manufacturers that are named after the founder are sorted by surname. Manufacturers that are named after the founder are sorted by surname.

4. Marcasite - Wikipedia

   en.wikipedia.org/wiki/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".

5. List of jewellery types - Wikipedia

   en.wikipedia.org/wiki/List_of_jewellery_types

   This page was last edited on 6 February 2025, at 11:20 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.

6. Pyrite - Wikipedia

   en.wikipedia.org/wiki/Pyrite

   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 ...

7. 'Free speech and transparency': White House launches ... - AOL

   www.aol.com/news/free-speech-transparency-white...

   "Welcome to the official Rapid Response account of the Trump 47 White House. We will be supporting President Donald J. Trump's America First agenda and holding the Fake News accountable for their ...