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marcasite
marcasite
marcasite Mineral, FeS
2; sp. gr. 4.8–4.9;
hardness 6.0–6.5;
orthorhombic; pale bronze-yellow; greyish-black
streak;
metallic lustre; crystals
tabular and spear-like, but it is also
massive, stalactitic, and radiating;
cleavage {101}; occurs in low-temperature mineral
veins together with zinc and lead ores, and in
sedimentary rocks, especially
limestone,
chalk, and
clay. It has been used in the production of sulphuric acid. Compare
PYRITE.
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Marcasite makes mark on jewelry
Newspaper article from: Chicago Sun-Times; 9/19/1986; ; 408 words
; ...your jewelry - marcasites were made to be...Technically, marcasite is crystallized...several pieces of marcasite jewelry, including...Surrounded by marcasites, it is priced...going rate for old marcasite bracelets ranges...be identified by marcasites set in a base of...
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Occurrence of marcasite in an organic-rich Holocene estuarine mud.
Magazine article from: Australian Journal of Soil Research; 9/1/2004; ; 700+ words
; Introduction Marcasite is the mineral dimorph of pyrite, sharing...sediments (Berner 1970), whereas diagenic marcasite has only been reported in Cretaceous...Vaughan and Lennie 1991). Like pyrite, marcasite contains [S.sub.2.sup.2...
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Pyrite and marcasite intergrowths from Northern Illinois.
Magazine article from: The Mineralogical Record; 3/1/1995; ; 700+ words
; Excellent microcrystals of pyrite and marcasite are found in vugs in Ordovician limestone...The crystals include pyrite "bars" and marcasite blades which are epitactic on early-formed marcasite whisker crystals. INTRODUCTION Three quarries...
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BEYOND MARCASITE: JUDITH JACK'S GOLD RUSH.
Magazine article from: WWD; 3/8/1999; ; 700+ words
; ...gold collection to its established marcasite-driven bridge jewelry business. "Judith Jack has transcended marcasite," said Michael Horowitz, president...semiprecious stones and mixed with marcasite, is set at a price point that Horowitz...
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Bling & Things
Magazine article from: Antiques & Collecting Magazine; 3/1/2008; ; 700+ words
; ...you Know? Do you know how marcasites and aurora borealis rhinestones...exactly they are made of? Marcasites are basically a silvery...white iron pyrite. Most marcasites are actually not the mineral marcasite at all, but are pyrite crystals...
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Accessories: a color-filled season. (women's clothing accessory styles)(WWD/MAGIC International)
Magazine article from: WWD; 1/16/1996; ; 700+ words
; ...Femininity will also play a role at marcasite maker Judith Jack, according to Eileen...necklaces, and items with square and round marcasite comprise the firm's latest feminine...Creations/Jenna Nicole, which also markets marcasite jewelry, is set to unveil a line featuring...
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 "Albany Times Union (Albany, NY)")
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Kewpies near century mark.(Life-Spaces)
Newspaper article from: Albany Times Union (Albany, NY); 5/17/2008; 700+ words
; ...possibly worth $5,000 or more. Q: My snake-shaped silvery pin was sold to me as silver set with marcasite. What is marcasite? A: Marcasite is a mineral like pyrite ( fools gold ), but it has a different crystal structure. It is sometimes...
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the kewpie is still dear to collectors antiques and collecting.(Flavor/Gracious Living)
Newspaper article from: The Virginian Pilot; 5/11/2008; 700+ words
; ...possibly worth $5,000 or more. Q. My snake-shaped silvery pin was sold to me as silver set with marcasite. What is marcasite? A. Marcasite is a mineral like pyrite ( fools gold ), but it has a different crystal structure. It is sometimes...
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Judith Jack adds bags, belts.
Magazine article from: WWD; 7/29/1988; ; 664 words
; ...jewelry manufacturer best known for its marcasite pieces, has added a line of handbags...holiday/resort. "I often pin one of our marcasite brooches to my handbag when I go out...french lamb, lizard and suede. The marcasite ornaments, manufactured in Judith Jack...
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Judith Jack launches a second belt line. (Brief Article)
Magazine article from: WWD; 3/20/1992; ; 650 words
; ...jewelry firm here best known for its marcasite designs, has introduced a lower-priced...collection featuers goldplated buckles with marcasite and sterling accents and wholesales for...developed a fairly strong following of marcasite jewelry fans, and we wanted to do...
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marcasite
Book article from: A Dictionary of Earth Sciences
marcasite Mineral, FeS 2 ; sp. gr. 4.8–4.9; hardness 6.0–6.5; orthorhombic ; pale bronze-yellow...
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Polymorph
Book article from: World of Earth Science
...graphite is hexagonal. Pyrite is the cubic form of FeS 2 , marcasite, the orthorhombic version. A single chemical composition...more energy. The examples of diamond-graphite, pyrite-marcasite, and calcite-aragonite are all known as reconstructive...
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coralloid
Book article from: A Dictionary of Earth Sciences
coralloid Literally, coral-like, but used to describe the circular, curved, or irregular shapes that sometimes result from the chemical precipitation of minerals, e.g. marcasite .
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Lead
Book article from: How Products Are Made
...three minerals. However, most deposits of these ores are not found alone but mixed with other minerals such as pyrite, marcasite, and zinc blende. Therefore much lead ore is obtained as a byproduct of other metal mining, usually zinc or silver. Only...
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pyrite
Book article from: A Dictionary of Earth Sciences
...metamorphic rocks , and common in hydrothermal veins, in replacement deposits, and contact metamorphic rocks ; alters to iron sulphate and limonite . It was formerly used widely for the production of sulphuric acid. Compare MARCASITE .
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