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labradorite

labradorite , a variety of plagioclase feldspar .

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"labradorite." The Columbia Encyclopedia, Sixth Edition. 2008. Encyclopedia.com. 17 Dec. 2009 <http://www.encyclopedia.com>.

"labradorite." The Columbia Encyclopedia, Sixth Edition. 2008. Encyclopedia.com. (December 17, 2009). http://www.encyclopedia.com/doc/1E1-labrador.html

"labradorite." The Columbia Encyclopedia, Sixth Edition. 2008. Retrieved December 17, 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. 17 Dec. 2009 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "labradorite." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (December 17, 2009). http://www.encyclopedia.com/doc/1O13-labradorite.html

AILSA ALLABY and MICHAEL ALLABY. "labradorite." A Dictionary of Earth Sciences. 1999. Retrieved December 17, 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. 17 Dec. 2009 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "high-potassium basalt." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (December 17, 2009). http://www.encyclopedia.com/doc/1O13-highpotassiumbasalt.html

AILSA ALLABY and MICHAEL ALLABY. "high-potassium basalt." A Dictionary of Earth Sciences. 1999. Retrieved December 17, 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
	A new source of gem-quality cordierite and corundum in the Laramie Range of southeastern Wyoming. Magazine article from: Rocks & Minerals; 9/1/2002
	The plagioclases.(UPDATES)(Brief article) Magazine article from: Rocks & Minerals; 9/1/2007

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	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...
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	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...
	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...
	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...
	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...
	Andesine Aggravation. Magazine article from: Jewelers Circular Keystone; 5/1/2008; 700+ words ; ...started selling red and green andesine-labradorite, we did send samples to the labs as...fine-quality red and green andesine-labradorite is putting pressure on the supply side...Clean, unzoned green andesine-labradorite is nearly nonexistent. ... We have...