FACTOID # 22: South Dakota has the highest employment ratio in America, but the lowest median earnings of full-time male employees.
 
 Home   Encyclopedia   Statistics   States A-Z   Flags   Maps   FAQ   About 
   
 
WHAT'S NEW
 

SEARCH ALL

FACTS & STATISTICS    Advanced view

Search encyclopedia, statistics and forums:

 

 

(* = Graphable)

 

 


Encyclopedia > Jet (lignite)
A sample of jet

Jet is a geological material that is not considered a mineral in the true sense of the word, but rather, a mineraloid derived from decaying wood under extreme pressure, thus organic in origin. The name "jet" is the English word derived from the French “jaiet”. Jet is black or dark brown but may contain pyrite inclusions, which have a brassy colour and metallic lustre. Jet is the result of high pressure decomposition of the Araucaria araucana (Pehuén or Monkey-puzzle tree).[1] Image File history File links Jet_(lignite)_low_quality. ... Image File history File links Jet_(lignite)_low_quality. ... Minerals are natural compounds formed through geological processes. ... A mineraloid is a mineral-like substance that does not demonstrate crystallinity. ... This article is about the mineral Pyrite or Fools Gold. ... In mineralogy, an inclusion is any material that is trapped inside a mineral during its formation. ... Lustre (American English: luster) is a description of the way light interacts with the surface of a crystal, rock or mineral. ... Binomial name Araucaria araucana (Molina) K. Koch Araucaria araucana (Pehuén or Monkey-puzzle) is the hardiest species in the conifer genus Araucaria. ...

Hallstatt culture bracelets made from jet and bronze, unearthed at Magdalenenberg
Hallstatt culture bracelets made from jet and bronze, unearthed at Magdalenenberg

Jet is found in one of two forms, hard and soft. "Hard" jet is the result of the carbon compression and salt water; "soft" jet is the result of the carbon compression and fresh water. Jet is easily polished and has been used in the manufacture of jewellery, according to the Whitby Museum, dating to 10,000 BC in certain portions of modern day Germany. The adjective jet-black is perhaps more well-known than is this mineral from which it is derived. Image File history File linksMetadata Size of this preview: 800 × 321 pixels Full resolution (1854 × 745 pixel, file size: 264 KB, MIME type: image/jpeg) Braceletts found in a grave of the Hallstatt culture. ... Image File history File linksMetadata Size of this preview: 800 × 321 pixels Full resolution (1854 × 745 pixel, file size: 264 KB, MIME type: image/jpeg) Braceletts found in a grave of the Hallstatt culture. ... The Hallstatt culture was the predominant Central European culture during the local Bronze Age, and introduced the Iron Age. ... Amber jewellery in the form of pendants. ...


Jet as a gem material was highly popular during the reign of Queen Victoria, during which the Queen wore Whitby jet as part of her mourning dress. Jet was popular for mourning jewellery in the 19th century because of its sombre color and modest appearance, and it has been traditionally fashioned into rosaries for monks. In the United States, long necklaces of jet beads were very popular during the 1920s, or Roaring Twenties, when women and young flappers would wear multiple strands of jet beads stretching from the neckline to the waistline. In these necklaces, the jet was strung using heavy cotton thread; small knots were made on either side of each bead to keep the beads spaced evenly, much in the same way that fine pearl necklaces are made. Jet has also been known as black amber, as it may induce an electric charge like that of amber when rubbed. Powdered jet added to water or wine was believed to have medicinal powers. A selection of gemstone pebbles made by tumbling rough rock with abrasive grit, in a rotating drum. ... Victoria (Alexandrina Victoria; 24 May 1819 – 22 January 1901) was the Queen of the United Kingdom of Great Britain and Ireland from 20 June 1837, and the first Empress of India from 1 May 1876, until her death on 22 January 1901. ... Whitby is a historic town in North Yorkshire on the north-east coast of England. ... Amber jewellery in the form of pendants. ... Our Lady of Lourdes - Mary appearing at Lourdes with Rosary Beads The Rosary (from Latin rosarium, crown of roses), an important and traditional devotion of the Catholic Church consisting of a set of prayer beads and a system of set prayers. ... A necklace is an article of clothing or jewelry; which is worn around the neck. ... The 1920s is a decade sometimes referred to as the Jazz Age or the Roaring Twenties, usually applied to America. ... A scene typical of the Follies of Florenz Ziegfeld, the most popular Broadway impresario of the decade. ... The term flapper, which became common slang in the 1920s, referred to a new breed of young women who wore short skirts, bobbed their hair and flaunted their disdain for what was then considered decent behavior. ... Strand of akoya pearls from China Pearl farm, Seram, Indonesia A pearl is a hard, rounded object produced by certain animals, primarily mollusks such as oysters. ... Amber pendants. ... See drugs, medication, and pharmacology for substances that are used to treat patients. ...


Although now much less popular, authentic jet jewels are valued by collectors. Anthracite (hard coal) and vulcanite are similar materials that have been used to imitate fine jet: these imitations are not always easy to distinguish from the real thing. Unlike black glass which is cool to the touch, jet is not, due to its greater insulating properties. Also, the structure of jet (which is remarkably like the wood that it is derived from) can be seen under 120X or greater microscopes. Anthracite coal Anthracite is a hard, compact variety of mineral coal that has a high luster. ... Coal Coal (IPA: ) is a fossil fuel formed in swamp ecosystems where plant remains were saved by water and mud from oxidization and biodegradation. ... Glass can be made transparent and flat, or into other shapes and colors as shown in this sphere from the Verrerie of Brehat in Brittany. ... Robert Hookes microscope (1665) - an engineered device used to study living systems. ...


External links

  • Whitby Jet Definition
  • Whitby Jet
  • Jet, the fossilized wood, the Asturian Jet in the Jurassic.

  Results from FactBites:
 
Jet (lignite) - Wikipedia, the free encyclopedia (432 words)
Jet is a geological material that is not considered a mineral in the true sense of the word, but rather, a mineraloid derived from decaying wood under extreme pressure, thus organic in origin.
Jet as a gem material was highly popular during the reign of Queen Victoria, during which the Queen wore Whitby jet as part of her mourning dress.
Jet, the fossilized wood, the Asturian Jet in the Jurassic.
Jet - Wikipedia, the free encyclopedia (505 words)
In meteorology, a jet is an electrical discharge that occurs high above the cumulonimbus cloud of an active thunderstorm.
In astrophysics, a relativistic jet is a stream of fast-moving plasma emitted from an active galaxy.
Jet, a character from Wildstorm/DC Comics, and the daughter of Backlash.
  More results at FactBites »

 
 

COMMENTARY     


Share your thoughts, questions and commentary here
Your name
Your comments

Want to know more?
Search encyclopedia, statistics and forums:

 


Press Releases |  Feeds | Contact
The Wikipedia article included on this page is licensed under the GFDL.
Images may be subject to relevant owners' copyright.
All other elements are (c) copyright NationMaster.com 2003-5. All Rights Reserved.
Usage implies agreement with terms, 1022, m