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For other uses, see Jasper (disambiguation).
Jasper outcrop, Bucegi Mountains, Romania

Jasper, an aggregate of microquartz and/or chalcedony and other mineral phases,[1][2] is an opaque,[3] impure variety of silica, usually red, yellow, brown or green in color; and rarely blue. The common red color is due to iron(III) inclusions. The mineral aggregate breaks with a smooth surface and is used for ornamentation or as a gemstone. It can be highly polished and is used for vases, seals, and snuff boxes. The specific gravity of jasper is typically 2.5 to 2.9.[4] Along with heliotrope (bloodstone), jasper (green with red spots) is one of the traditional birthstones for March. Jaspilite is a banded iron formation rock that often has distinctive bands of jasper.

Etymology and history[edit]

Moveable ring from 664 to 322 BC (Late Period). Green jasper and gold.[5] The Walters Art Museum
Goat-headed basket carved from red jasper. Russian, late 19th century, Kremlin Armoury

The name means "spotted or speckled stone", and is derived via Old French jaspre (variant of Anglo-Norman jaspe) and Latin iaspidem (nom. iaspis)) from Greek ἴασπις iaspis, (feminine noun)[6] from an oriental language (cf. Hebrew יושפה yushphah, Akkadian yashupu).[7]

Green jasper was used to make bow drills in Mehrgarh between 4th and 5th millennium BC.[8] Jasper is known to have been a favorite gem in the ancient world; its name can be traced back in Arabic, Persian, Hebrew, Assyrian, Greek and Latin.[9] On Minoan Crete, jasper was carved to produce seals circa 1800 BC, as evidenced by archaeological recoveries at the palace of Knossos.[10]

Although the term jasper is now restricted to opaque quartz, the ancient iaspis was a stone of considerable translucency including nephrite.[2] The jasper of antiquity was in many cases distinctly green, for it is often compared to the emerald and other green objects. Jasper is referred to in the Niebelungenlied as being clear and green. Probably the jasper of the ancients included stones which would now be classed as chalcedony, and the emerald-like jasper may have been akin to the modern chrysoprase. The Hebrew word yushphah may have designated a green jasper.[11] Flinders Petrie suggested that the odem, the first stone on the High Priest's breastplate, was a red jasper, whilst tarshish, the tenth stone, may have been a yellow jasper.[12]

Types[edit]

Jasper is an opaque rock of virtually any color stemming from the mineral content of the original sediments or ash. Patterns arise during the consolidation process forming flow and depositional patterns in the original silica rich sediment or volcanic ash. Hydrothermal circulation is generally thought to be required in the formation of jasper.[citation needed]

Jasper can be modified by the diffusion of minerals along discontinuities providing the appearance of vegetative growth, i.e., dendritic. The original materials are often fractured and/or distorted, after deposition, into myriad beautiful patterns which are to be later filled with other colorful minerals. Weathering, with time, will create intensely colored superficial rinds.

The classification and naming of jasper varieties presents a challenge.[13] Terms attributed to various well-defined materials includes the geographic locality where it is found, sometimes quite restricted such as "Bruneau" (a canyon) and "Lahontan" (a lake), rivers and even individual mountains, many are fanciful such as "forest fire" or "rainbow", while others are descriptive such as "autumn" or "porcelain". A few are designated by the place of origin such as a brown Egyptian or red African.

Picture jaspers exhibit combinations of patterns (such as banding from flow or depositional patterns (from water or wind), dendritic or color variations) resulting in what appear to be scenes or images, on a cut section. Diffusion from a center produces a distinctive orbicular appearance, i.e., leopard skin jasper, or linear banding from a fracture as seen in leisegang jasper. Healed, fragmented rock produces brecciated (broken) jasper. While these "picture jaspers" can be found all over the world, specific colors or patterns are more unique based upon the geographic region from which they originate. Oregon's biggs jasper and bruneau jasper from Bruneau Canyon near the Bruneau River in Idaho are known as particularly fine examples. Other examples can be seen at Llanddwyn Island in Wales.[14]

The term basanite has occasionally been used to refer to a variety of jasper, a jasper pear for example or a black flinty or cherty jasper found in several New England states of the USA and in South Korea. Such varieties of jasper are also informally known as lydian stone or lydite and have been used as touchstones in testing the purity of precious metal alloys.[15]

Gallery[edit]

Varieties of jasper
Brecciated red jasper tumbled smooth, 1 in (2.5 cm) 
Brecciated yellow jasper, cut and oiled 
Green jasper rough, Montjuïc, Barcelona 
Orbicular jasper, 5 cm (2.0 in), Madagascar 

See also[edit]

References[edit]

  1. ^ "U.S. Geological Survey, Chalcedony Site". www.USGS.gov. 
  2. ^ a b Kostov, R. I. 2010. Review on the mineralogical systematics of jasper and related rocks. – Archaeometry Workshop, 7, 3, 209-213. PDF
  3. ^ "Jasper". Mindat.org. 
  4. ^ Dietrich, R. V. (2005-05-23). "Jasper". GemRocks. Central Michigan University. 
  5. ^ "Finger Ring with a Representation of Ptah". The Walters Art Museum. 
  6. ^ "Strong's G2393-iaspis". Lexicon. Blue Letter Bible. 
  7. ^ "Jasper" at etymonline.com
  8. ^ Kulke, Hermann; Rothermund, Dietmar (2004). A History of India. Routledge. p. 22. ISBN 0-415-32920-5. 
  9. ^ "Jasper". Gem by Gem. International Colored Gemstone Association. 
  10. ^ Hogan, C. Michael (2008-04-14). "Knossos fieldnotes". The Modern Antiquarian. 
  11. ^  One or more of the preceding sentences incorporates text from a publication now in the public domainFrederick William Rudler (1911). "Jasper". In Chisholm, Hugh. Encyclopædia Britannica (11th ed.). Cambridge University Press. 
  12. ^ Hastings's Dict. Bible, 1902, as cited in 1911 Britannica.
  13. ^ "World of Jaspers". Hans Gamma. 
  14. ^ Jasper Gemological Information - International Gem Society (IGS) Retrieved 16 January, 2015
  15. ^ "Mindat data for basanite". Mindat.org. 2012-10-15. Retrieved 2013-03-24. 

External links[edit]


Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Jasper — Please support Wikipedia.
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2012 - Jasper National Park, Alberta, Canada

I'm especially proud to share this particular video of mine. In my opinion, it is the first true CANADIAN video I've put together that represents some of the most ...

Jasper Forks - Another Sleepless Night (Official Video HD)

TAKEN FROM KONTOR HOUSE OF HOUSE VOL. 19 +++ 42 FULL LENGTH & UNMIXED CLUB ANTHEMS PLUS SPECIAL DJ-MASTERMIX +++ INCL.

Jasper's Nightmare (Steven Universe)

Voices: Wimpy Jasper - http://vitalregionsinvaded.tumblr.com Buff Lapus, Buff Peridot, Buff Jasper - http://teilwal.tumblr.com Comic - http://tooneyd.tumblr.com/ ...

Lapis Lazuli And Jasper Fuse [Clip] (Steven Universe) Malachite

All rights go to cartoon network. I did not make this show. All rights go to Rebecca Sugar.

Jasper - Der HDL-Song - [original & live]

Weitere Infos unter www.jaspermusik.de ---------------------------------------------------------------------- DiEseS LieD IsT FüR aLLe MeInE LieBEn FReuNdE UnD soLCHe, ...

Jasper and Peridot - Love the Way You Lie Nightcore

Jasper is a strong and muscular gem that no one knows the story. Peridot is smart and skinny. Everyone thought Peridot would be like a really bad guy, but he's ...

Jasper - Neidlos - [original & live]

Weitere Infos unter www.jaspermusik.de ---------------------------------------------------------------------- Ich bin neidlos glücklich...

Jasper Cillessen ● Best Saves ● 2014-2015 ● AFC Ajax ● HD

Jasper Cillessen best saves 2014/2015 Ajax reddingen en penalty saves Dutch Goalkeeper Song name: Coasts - Modern Love.

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Jasper National Park in Canada is now home to a beautiful skywalk that offers tourists and thrill seekers an adrenaline rush. Jasper National Park in Canada is ...

Tyler, The Creator - Bitch Suck Dick Featuring Jasper And Taco

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3476645 news items

Dallas Morning News (blog)

Dallas Morning News (blog)
Wed, 01 Jul 2015 11:49:29 -0700

Those impressive numbers are a big reason linebacker Jasper Brinkley signed a two-year, $6.5 million deal with the Cowboys in March. “I played in Minnesota for five years and I remember when he was in Chicago, just thinking about those defenses and the ...
 
Charleston Post Courier
Thu, 02 Jul 2015 11:05:53 -0700

This rendering of the revised Jasper project shows it from the western end of Broad Street, near where it turns onto Lockwood Boulevard. This design was rejected by the Board of Architectural Review last month. The Beach Co. is appealing the decision ...

ABC NEWS 4

ABC NEWS 4
Thu, 02 Jul 2015 09:30:00 -0700

CHARLESTON, S.C. (WCIV) -- The Beach Company has appealed the Board of Architectural Review's denial of the design for the redevelopment of the Sergeant Jasper property. The appeal, arguing that the board's denial was legally improper, was filed in ...

Newsbug.info

Newsbug.info
Thu, 02 Jul 2015 22:12:01 -0700

The Jasper County Sheriffs' deputies who responded found evidence of a weapon being fired from the roadway into the home, damaging windows and siding. Unknown suspects fled the scene prior to law enforcement's arrival. There were no injuries reported ...
 
Daily Mountain Eagle
Thu, 02 Jul 2015 06:07:30 -0700

Hope Missions sent mission groups out to work in Jasper this week. Members of the groups come from churches in Alabama, Kentucky, Mississippi and South Carolina. “God is good to us and He serves us. From that, we serve others,” said Amanda Patterson, ...

WSAV-TV

WSAV-TV
Tue, 30 Jun 2015 02:46:15 -0700

It's a story you'll only see on NEWS 3, video of an organized fight in Jasper county goes viral, and this morning police are looking for the people involved. The video is graphic and is causing some like Charles Mitchell to voice concerns over rising ...

NBC 5 Dallas-Fort Worth (blog)

NBC 5 Dallas-Fort Worth (blog)
Thu, 02 Jul 2015 10:26:15 -0700

We've heard more than once since Marinelli arrived in town in 2013 that players have come to Dallas in free agency just to work with him, a defensive line expert without equal and a pass rush whisperer whose defenses are known for going hard and ...

Coconuts Hong Kong

Shanghaiist
Thu, 02 Jul 2015 23:11:15 -0700

Jasper Tsang, the President of the Legislative Council of Hong Kong, has come under fire for a recently published audio clip in which he can be heard repeating a racist joke about Africans. The clip was secretly recorded during a private talk given by ...
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