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Topic: Jet (lignite)

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  Jet (lignite) - Wikipedia, the free encyclopedia
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.
en.wikipedia.org /wiki/Jet_(lignite)   (432 words)

 Jet - Wikipedia, the free encyclopedia
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.
en.wikipedia.org /wiki/Jet   (505 words)

Jet is a geological material that is not considered a mineral in the true sense of the word.
A jet is a stream of fluid produced by discharge through an orifice into free space.
Since gas is a compressible fluid, the velocity attained by a jet of gas cannot be determined by Bernoulli's principle[?].
www.ebroadcast.com.au /lookup/encyclopedia/je/Jet.html   (165 words)

 jet - definition by dict.die.net
Jet ant (Zo["o]l.), a flish European ant (Formica fuliginosa), which builds its nest of a paperlike material in the trunks of trees.
Jet propeller (Naut.), a device for propelling vessels by means of a forcible jet of water ejected from the vessel, as by a centrifugal pump.
Jet pump, a device in which a small jet of steam, air, water, or other fluid, in rapid motion, lifts or otherwise moves, by its impulse, a larger quantity of the fluid with which it mingles.
dict.die.net /jet   (253 words)

 Whitby Jet
Jet is found in seams in the bituminous shales, between Robin Hood's Bay and Boulby, which extend under the sea and often pieces broken away by bad weather yield jet, which is washed up in various sized pieces as far afield as Bridlington and Saltburn.
Jet from the shales to the east of Whitby is poor in quality, possibly due to the effect of alum deposits adjacent to the jet-bearing shales.
For this reason, too, washed jet is not very valuable, since each piece has to be painstakingly examined by a craftsman who, scraping each piece minutely with his knife, separates the good from the poor.
www.whitby-uk.com /cgi-bin/site.nav/whitby.pl?page=whitbyjet   (1966 words)

 Physical Characteristics and Location of Jet   (Site not responding. Last check: 2007-11-01)
Jet, a beautiful fl substance, is in point of fact a lignite produced by the decomposition of resinous vegetation buried in the earth thousands of ages before the historic times.
Jet is found in all places where amber exists, and in many localities also where amber is not found.
Jet is worked by means of a lathe and horizontal sandstone wheels, smooth at the centre, but rough at their circumferences, so that the workman may cut and polish a stone on the same wheel.
www.jjkent.com /articles/jet-characteristics-locations.htm   (343 words)

 JET (Fr. jais, Ger. Ga... - Online Information article about JET (Fr. jais, Ger. Ga...
Lycia, where jet, or a similar substance, was originally found.
Spain, but it is generally less hard and lustrous than true Whitby jet.
United States jet is known at many localities but is not systematically worked.
encyclopedia.jrank.org /JEE_JUN/JET_Fr_jais_Ger_Gagat_.html   (792 words)

 Amber and Jet
Jet, known in folklore as "fl amber" or "witch's amber," was also used in jewelry, in magic and incense, and is believed to be a potent protective and grounding agent.
Jet jewelry should not be loaned out, as it is said to be so absorptive that its owner can be vulnerable to negative magic if it falls into the wrong hands.
Jet is more likely than glass to display tiny cracks and scratches, or to be irregularly faceted, and to feel lighter and warmer to the touch.
www.ladybridget.com /w/amberjet.html   (1583 words)

 Books By Hand - About Jet   (Site not responding. Last check: 2007-11-01)
Jet is a hard fl type of lignite, a type of fossilised wood similar to coal.
Jet is fairly easy to work and is often carved into quite intricate designs and highly polished.
The word "jet" comes from Anglo-French "geet" (Old French "jaiet"), but originates in Ancient Greek "lithos gagates" which means "stone from Gagai", a town in Asia Minor, where presumably there were deposits of jet.
www.booksbyhand.co.uk /jet.htm   (202 words)

 The Amber Lady; Handmade Jet Neckware   (Site not responding. Last check: 2007-11-01)
Jet is from the wood of the tree and symbolizes the dark of the night.
Jet is a gemstone with a history as ancient and interesting as that of Amber.
Jet is formed by the compression of lignite, an organic material that was once driftwood.
amberlady.com /jetneckware.htm   (370 words)

 Jet Black Amber Silver Jewelry Earrings, Pendant, Necklace
Jet is composed of carbonized wood (lignite coal).
In the 16th Century, Jet was thought of as fl Amber and commonly used in Rosary Beads.
Jet is an important gemstone for the 1st Chakra, thought to provide protection from illness and violence and to strengthen psychic awareness.
www.luckygemstones.com /jet-jewelry-black-mourning-gem.htm   (719 words)

 Bronze Age Craft (Jet)   (Site not responding. Last check: 2007-11-01)
Jet is a type of brown coal from fossilized trees, similar to the monkey-puzzle tree from 180 million years ago.
Although jet was used in Europe around 10,000 BC, it was not used in Britain until the late Neolithic Period in the form of Beaker grave goods with items like V-perforated buttons, belt rings, early washer-shaped bead necklaces and an unusual mace head from the Clandon Barrow, Dorset.
Jet can be easily drilled using a bow drill tipped with a flint or bronze bit, and polished using a fine abrasive, like clay, on animal hide and may have been oiled to bring out the deep lustre after polishing.
www.templeresearch.eclipse.co.uk /bronze/jet.htm   (336 words)

 Jet - ZnetShows.com   (Site not responding. Last check: 2007-11-01)
Jet has a dull luster on its broken surfaces and is typically cut into beads, crosses, bracelets, cabochons, and other various decorative objects.
Jet is actually a highly compressed, extremely hard form of coal, which is, in turn, a form of carbon.
During the Victorian era, jet was a popular mourning gemstone, used to express grief at the death of a loved one.
www.znetshows.com /LearnGemStone/Define/define_item.asp?ID=28   (144 words)

 Jet - Search Results - ninemsn Encarta
Jet Propulsion, the imparting of forward motion to an object, as a reaction to the rearward expulsion of a high-velocity liquid or gaseous stream.
Jet, hard, compact, deep fl variety of lignite.
Jet Stream, strong narrow current of fast-moving air, concentrated along a nearly horizontal axis and existing in the upper atmosphere.
au.encarta.msn.com /Jet.html   (161 words)

 Gems.gr   (Site not responding. Last check: 2007-11-01)
Jet (lignite) is a mineraloid derived from decaying wood under extreme pressure, thus organic in origin.
Jet is easily polished and has been used in the manufacture of jewellery.
Smilar materials that are used to imitate fine jet are vulcanite and anthracite (hard coal).
www.ship.gr /gems/jet.htm   (78 words)

 GemRocks: Jet
Although jet is usually characterized, quite properly, as dense and homogeneous, much of it exhibits a woody structure, which manifests its derivation from conifers.
Russian jet - jet from the vicinity of Irkutsk, Siberia.
Also, anything made from jet should not be put in contact with acids because such contact tends to cause its surfaces to lose their luster.
www.cst.cmich.edu /users/dietr1rv/jet.htm   (2050 words)

 jet - Search Results - MSN Encarta
Jet Propulsion, thrust imparting forward motion to an object, as a reaction to the rearward expulsion of a high-velocity liquid or gaseous stream.
Jet (mineral), hard, compact, deep fl variety of lignite.
Wartime technology efforts also brought to aviation critical new developments, such as the jet engine.
ca.encarta.msn.com /jet.html   (148 words)

Jet is a type of brown coal, fossilised wood of an ancient tree, similar to our present day "Araucaria", the monkey puzzle tree.
Jet is found throughout the world, although not all of it is the hard jet.
Differences between hard and soft jets, lignite and cannel coal is so small, we can say that a type of jet is found in, Russia; Turkey; Germany; France; Spain; Portugal and North America, as well as in England.
www.queensland.co.uk /whitby2.html   (997 words)

 jet - Definition, Synonyms, and Reference from OnPedia.com
jet engine - a gas turbine produces a stream of hot gas that propels a jet plane by reaction propulsion
jet - the occurrence of a sudden discharge (as of liquid)
Ketalar, ketamine, ketamine hydrochloride - a general anesthetic and tranquilizer (not a barbiturate) that is administered intravenously or intramuscularly; used mainly by veterinarians or for minor surgery with geriatric or pediatric patients; taken in large doses it causes hallucinations similar to those associated with the use of PCP
www.onpedia.com /dictionary/jet   (321 words)

 petrolpump.co.in : energy sources, Coal, Anthracite coal, Bituminous coal, Lignite coal, Sub-bituminous coal, Coke, ...
Lignite coal is the lowest rank of coal, often referred to as brown coal, used almost exclusively as fuel for steam-electric power generation.
Sub-bituminous coal is a coal whose properties range from those of lignite to those of bituminous coal and are used primarily as fuel for steam-electric power generation.
Jet is a compact form of lignite that is sometimes polished and has been used as an ornamental stone since the Iron Age.
www.petrolpump.co.in /energy-sources/coal.htm   (1720 words)

 Jet is a very hard variety of coalt - Diamonds, Gems
Jet has a dull luster on broken surfaces, and a hardness of 21/2-4 cu the Mohs scale.
Imitations inclu6 dyed chalcedony, fl tourmaline, garnet, and obsidian (all are hard,' than jet and feel colder to the skin); bakelite (pungent odor whe¬n heated); glass (vitreous luster on broken surface); rubber, notably a hard variety called vulcanite, but this is easily distinguished because it gives, burned-rubber odor when heated.
jet is customarily cut into beads, crosses, bracelets, cabochons, and various useful and decorative objects.
www.wonderxtreme.com /shell.htm   (389 words)

 MFA - CAMEO - Print Page
Lignite, or wood coal, falls between peat and bituminous coal in density and carbon content.
Lignite is used to produce some brown colorants, such as sap brown dye and Vandyke brown.
Jet is a very dense form of lignite.
www.mfa.org /_cameo/frontend/material_print.asp?name=Lignite&type=all   (227 words)

 Jet gemstone meaning
Jet occurs in fl or dark brown and is a variety of coal known as lignite.
Jet is an excellent stone for use in magic rituals to draw and channel the elements of the earth's energies in a desired direction.
Jet is used by healers to aid the cleansing of the liver and kidneys.
www.crystal-cure.com /jet.html   (169 words)

 Online Etymology Dictionary
The noun sense of "stream of water" is from 1696; that of "spout or nozzle for emitting water, gas, fuel, etc." is from 1825.
Hence jet propulsion (1867) and the noun meaning "airplane driven by jet propulsion" (1944, from jet engine, 1943).
Jet set first attested 1951, slightly before jet commuter plane flights began.
www.etymonline.com /index.php?search=jet   (218 words)

 Jet - Encyclopedia, History, Geography and Biography
Blue jet, a form of upper atmospheric lightning
JET (Joint European Torus), an experimental Nuclear fusion reactor.
A Jet is an electrical discharge that occurs high above the cumulonimbus cloud of an active thunderstorm.
www.arikah.net /encyclopedia/Jet   (328 words)

 Monterey Trip #10
Jet is a hard, shiny fl material derived from the metamorphosis and anaerobic fossilization of conifer wood buried under sediments in ancient seas.
Chemically, jet it is a hard, carbonized form of bituminous coal with a density similar to anthracite coal.
Jet takes a high polish and has been used for shiny fl jewelry for thousands of years.
waynesword.palomar.edu /monter10.htm   (306 words)

 Definition of Jet from dictionary.net   (Site not responding. Last check: 2007-11-01)
To strut; to walk with a lofty or haughty gait; to be insolent; to obtrude.
(Min.) A variety of lignite, of a very compact texture and velvet fl color, susceptible of a good polish, and often wrought into mourning jewelry, toys, buttons, etc. Formerly called also fl amber.
Jet ant (Zo["o]l.), a flish European ant (
www.dictionary.net /jet   (239 words)

 MFA - CAMEO - Material Description
A dense, fl, lignite coal that can be carved and polished.
Jet is found in large deposits near Whitby in England and in the Asturias in northern Spain.
Jet was formed from driftwood from pines of the Araucaria genus that were subjected to intense pressure.
www.mfa.org /_CAMEO/FRONTEND/material_description.asp?name=Jet&language=1   (173 words)

 jet - the definition   (Site not responding. Last check: 2007-11-01)
of the flest fl; similar to the color of jet or coal [syn: coal-fl, jet-fl, pitchy, sooty] noun 1.
issue in a jet; come out in a jet; stream or spring forth; "Water jetted forth"; "flames were jetting out of the building" [syn: gush] 2.
Jet pump, a device in which a small jet of steam, air,
www.verboso.com /jet.html   (327 words)

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