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labradorite |
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labradorite (lăb`rədôrīt', lăbrədôr`īt), a variety of plagioclase feldspar feldspar (fĕl`spär, fĕld`–) or felspar ..... Click the link for more information. . labradoriteType of feldspar mineral in the plagioclase series that is often valued as a gemstone and as ornamental material for its red, blue, or green iridescence. The mineral is usually gray or brown to black and need not be iridescent. Labradorite is named for its occurrence on the coast of Labrador, Canada. labradorite [′lab·rə‚dȯ‚rīt] (mineralogy) A gray, blue, green, or brown plagioclase feldspar with composition ranging from Ab50An50to Ab30An70, where Ab = NaAlSi3O8and An = CaAl2Si2O8; in the course of formation when the natural material cools, the feldspar sometimes exhibits a variously colored luster. Also known as Labrador spar. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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