1) Alchemical substance 2) Sulfide mineral
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https://www.crosswordclues.com/clue/marcasite
1) Iron pyrites 2) Pyrites
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https://www.crosswordclues.com/clue/marcasite
The mineral marcasite, sometimes called white iron pyrite, is iron sulfide (FeS2) with orthorhombic crystal structure. It is physically and crystallographically distinct from pyrite, which is iron sulfide with cubic crystal structure. Both structures do have in common that they contain the disulfide S22- ion having a short bonding distance between...
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http://en.wikipedia.org/wiki/Marcasite
• (n.) A sulphide of iron resembling pyrite or common iron pyrites in composition, but differing in form; white iron pyrites.
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http://thinkexist.com/dictionary/meaning/marcasite/
an iron sulfide mineral that forms pale bronze-yellow orthorhombic crystals, usually twinned to characteristic cockscomb or sheaflike shapes; the ...
Found on
http://www.britannica.com/eb/a-z/m/32
Pyrite that is facetted into rose cuts and set into silver or pewter jewelry.
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http://www.encyclo.co.uk/local/22290
Originally common crystallised iron pyrites (iron sulphide), and later a misnomer for pyrite or white iron pyrites (iron disulphide). True marcasite is almost white, resembling pale bronze. The substitute pyrite was popular in Europe from the 18thC. Marcasite is usually set in silver or pewter and rose cut (see jewel cutting) or mounted in a pave s …...
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http://www.encyclo.co.uk/visitor-contributions.php
Mar'ca·site noun [ French
marcassite ; confer Italian
marcassita , Spanish
marquesita , Portuguese
marquezita ; all from Arabic
marqashītha .]
(Min.) A sulphide of iron resembling pyrite or common iron pyrites in composition, but differing in form; whi...
Found on
http://www.encyclo.co.uk/webster/M/22
Marcasite is one of the sulphides of iron, a paler form of iron pyrites. It often shows a white colour on a fresh surface. It is found in iron metallic veins and frequently with lead and zinc ores, and is also found in sedimentary rocks. Marcasite most frequently occurs as a replacement deposit in limestone and often in concretions imbedded in clay...
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http://www.probertencyclopaedia.com/browse/HM.HTM
Iron sulfide, di-
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http://www.translationdirectory.com/glossaries/glossary075.htm
Marcasite in jewellery making is actually made from pyrite as pure Marcasite tends to be too brittle and discolours easy. In jewellery the colour tends to be a dark silver metallic like gem usually used as many small stones joined together to form an overall pattern.
Found on
https://www.encyclo.co.uk/local/22607
No exact match found.
