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 (mär′kə-sīt′, -zīt′)
1. A mineral with the same composition as pyrite, FeS2, but differing in crystal structure. Also called white iron pyrites.
2. An ornament of pyrite, polished steel, or white metal.

[Middle English, from Medieval Latin marcasīta, from Arabic marqašīṯā, from Aramaic marqəšitā, from Akkadian marḫašu, from marḫaši, ancient region in the eastern Iranian plateau.]

mar′ca·sit′i·cal (-sĭt′ĭ-kəl) adj.


1. (Minerals) a metallic pale yellow mineral consisting of iron sulphide in orthorhombic crystalline form used in jewellery. Formula: FeS2
2. (Jewellery) a cut and polished form of steel or any white metal used for making jewellery
[C15: from Medieval Latin marcasīta, from Arabic marqashītā, perhaps from Persian]
marcasitical adj


(ˈmɑr kəˌsaɪt)

1. a common mineral, iron sulfide, FeS2, chemically identical to pyrite but crystallizing in the orthorhombic system.
a. a crystallized form of this, used for jewelry.
b. any mineral resembling this form or any substance imitating it, esp. as used in jewelry.
[1375–1425; < Medieval Latin marcasīta < Arabic < Aramaic]
mar`ca•sit′i•cal (-ˈsɪt ɪ kəl) adj.
References in periodicals archive ?
$4,500 Southern Plains Beaded Hide Moccasins, sinew-sewn; small glass beads of white, rose, cut brass, and faceted marcasite outline vamps and heel; with approximately 35 German silver buttons; yellow pigment and fringe embellishments, length 11 in., late 19th century.
But, what makes silver a smarter choice is the fact that it goes with gemstones like topaz, ruby, pearls, amber and marcasite. Despite being a low maintenance metal, beauty still favours silver.
New Ravenna features a Chinoiserie bird-on-branch pattern made of marcasite, mica, pewter and quartz glass.
Gregite ([Fe.sub.3] Iron Sulfide Corrosion Products: [S.sub.4]) Pyrite (Fe[S.sub.2]) (i) Pyrophoric iron sulfide Marcasite (Fe[S.sub.2]) (pyrrhotite-FeS) results from Mackinawite (Fe[S.sub.0.9]) the corrosive action of sulfur Pyrrhotite ([Fe.sub.7] or sulfur compounds [S.sub.8]) ([H.sub.2]S) on the iron (steel) and moisture.
The overarching goal of this work was to test the possibility of replacing sodium cyanide by chitosan polymer as a selective pyrite depressant in the bulk flotation of complex sulfide ore sample containing galena (PbS), chalcopyrite (CuFe[S.sub.2]), sphalerite (ZnS), pyrite (Fe[S.sub.2]), dolomite (CaMg[(C[O.sub.3]).sub.2]), and marcasite (a polymorph of pyrite).
These rocks contain a range of ore minerals, including pyrite, arsenopyrite, marcasite, realgar, orpiment, cinnabar, and stibnite.
Specimens on display include: azurite, calcite, fluorite, galena, hematite, magnetite, malachite, marcasite, native copper, and sphalerite.
There is a good range of silver set semi-precious stones from around the UK including Whitby Jet, Derbyshire Blue John, Scottish marble and marcasite as well as more exotic stones such as Lapis Lazuli, turquoise and moonstone.
It was identified by JCP.CAT search & match programmes of the X-ray Diffractometer that the minor peaks correspond to, marcasite (Fe[S.sub.2]), arsenopyrite (FeAsS), chalcopyrite (CuFe[S.sub.2]), cinnabar (HgS), barite (BaS[O.sub.4]), calcite (CaC[O.sub.3]), dolmite [CaMg [(C[O.sub.3]).sub.2]] and clay minerals.
A Marchioness B Marquisette C Marcasite D Martinet QUESTION 5 - for 5 points: Which of these countries is home to the football team Galatasaray?
It is usually associated with the sulfide-rich fractions of pyrite and marcasite present in the coal.