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labradorite

labradorite , a variety of plagioclase feldspar .

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"labradorite." The Columbia Encyclopedia, Sixth Edition. 2008. Encyclopedia.com. 16 Nov. 2009 <http://www.encyclopedia.com>.

"labradorite." The Columbia Encyclopedia, Sixth Edition. 2008. Encyclopedia.com. (November 16, 2009). http://www.encyclopedia.com/doc/1E1-labrador.html

"labradorite." The Columbia Encyclopedia, Sixth Edition. 2008. Retrieved November 16, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-labrador.html

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labradorite

A Dictionary of Earth Sciences | 1999 | | Â© A Dictionary of Earth Sciences 1999, originally published by Oxford University Press 1999. (Hide copyright information) Copyright

labradorite See PLAGIOCLASE FELDSPAR.

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AILSA ALLABY and MICHAEL ALLABY. "labradorite." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 16 Nov. 2009 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "labradorite." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (November 16, 2009). http://www.encyclopedia.com/doc/1O13-labradorite.html

AILSA ALLABY and MICHAEL ALLABY. "labradorite." A Dictionary of Earth Sciences. 1999. Retrieved November 16, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-labradorite.html

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high-potassium basalt

A Dictionary of Earth Sciences | 1999 | | Â© A Dictionary of Earth Sciences 1999, originally published by Oxford University Press 1999. (Hide copyright information) Copyright

high-potassium basalt An igneous rock of basaltic composition characterized by the appearance of sanidine as well as labradorite in the groundmass, and by K₂O/Na₂O> 1. Such basalts are commonly found well inland on the continental side of a plate subduction zone. The K₂O content of basalts in these above-subductionzone environments increases inland as the depth to the subducted oceanic slab increases.

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AILSA ALLABY and MICHAEL ALLABY. "high-potassium basalt." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 16 Nov. 2009 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "high-potassium basalt." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (November 16, 2009). http://www.encyclopedia.com/doc/1O13-highpotassiumbasalt.html

AILSA ALLABY and MICHAEL ALLABY. "high-potassium basalt." A Dictionary of Earth Sciences. 1999. Retrieved November 16, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-highpotassiumbasalt.html

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Free newspaper and magazine articles

	The Plagioclase feldspars.(Lets Get It Right) Magazine article from: Rocks & Minerals; 7/1/2006
	The plagioclases.(UPDATES)(Brief article) Magazine article from: Rocks & Minerals; 9/1/2007
	Learn about the World Feldspar and Nepheline Syenite Market. Business Wire; 11/20/2008

Facts and information from other sites

Related articles from newspapers, magazines, and more

	Labradorite's 'Blue Rainbow Moonstone'.(Brief Article)(Statistical Data Included) Magazine article from: Jewelers Circular Keystone; 9/1/2001; ; 700+ words ; ...it is, and it isn't. Yes, it is labradorite. No, it isn't really the mineralogically...moonstone is an orthoclase feldspar, so the labradorite feldspar's so-called variety "blue...family tree. The difference between labradorite "moonstone" and orthoclase moonstone...
	OREGON SUNSTONE: Home-Grown Labradorite.(Gem Profile) Magazine article from: Modern Jeweler; 6/1/2008; 700+ words ; ...OREGON SUNSTONE: Home-Grown Labradorite BY DAVID FEDERMAN, CONTRIBUTING...mines currently producing this labradorite. Based in Bend, Oregon, Proud...especially with look-alike andesine labradorite selling for a fraction of their...
	Indian Green Labradorite.(Product & Literature Guide) Magazine article from: Stone World; 8/1/2006; 393 words ; Pokarna Limited proudly presents--"Indian Green Labradorite." This unique and exotic granite comes exclusively from India's # 1 Granite company in the form of slabs as well as tiles...
	The Plagioclase feldspars.(Lets Get It Right) Magazine article from: Rocks & Minerals; 7/1/2006; ; 700+ words ; ...metamorphosed limestone; bytownite and labradorite are characteristic of igneous rocks...sodic. Thus, the core may in fact be labradorite, for example, while the rest of the...end members albite and anorthite. Labradorite, unquestionably the most abundant if...
	Northern Lights.(Brief Article) Magazine article from: Town & Country; 10/1/2000; ; 448 words ; At first, labradorite, a mysterious stone discovered in...Swan glass intaglio earrings with labradorite triads ($2,025), at select Neiman...Stephen Dweck multistrand oval-faceted labradorite necklace ($2,240), at Bergdorf...
	The gems of New York State. Magazine article from: Rocks & Minerals; 11/1/2007; ; 700+ words ; ...feldspars found in New York include labradorite, peristerite, moonstone, amazonite, and sunstone. Labradorite and peristerite are plagioclase feldspars...obvious. Although classically gem labradorite is the species labradorite and gem...
	Sunstone.(Brief Article) Magazine article from: Jewelers Circular Keystone; 8/1/2001; 700+ words ; ...group. For example, moonstone and labradorite are the two most commonly known feldspars...orthoclase feldspar. Oligoclase and labradorite are both plagioclase (calcium) feldspars...potassium) feldspar. Sunstone is both a labradorite and oligoclase feldspar. Some sunstone...
	SPECTROLITE: Color-Play for Peanuts.(Gem Profile) Magazine article from: Modern Jeweler; 7/1/2009; 700+ words ; ...At its best, spectrolite, a type of labradorite first found in Finland, looks like...part of him that misses the labors of labradorite. Just based on the difficulties of...woefully underpriced. NO ROOM FOR ERROR Labradorite has colors running in layers parallel...
	Moonstone (orthoclase feldspar). Magazine article from: Jewelers Circular Keystone; 11/1/2003; 700+ words ; ...sanadine, oligoclase, microcline, and labradorite, to name just a few. These species...common varietal names--sunstone, labradorite, spectralite, and amazonite. Moonstone...are a combination of orthoclase and labradorite feldspars. Blue moonstone (see "Jewel...
	Andesine: red-hot feldspar.(GEM PROFILE) Magazine article from: Modern Jeweler; 3/1/2006; ; 700+ words ; ...intermediate member between oligoclase and labradorite, just on the borderline with the latter...member (albite, oligoclase, andesine, labradorite, bytownite, and anorthite) plagioclase...not too excited about calling it red labradorite either. To us, that's like calling...