Definitions for iceland spar
This page provides all possible meanings and translations of the word iceland spar
Random House Webster's College Dictionary
a transparent variety of calcite that is double-refracting and is used as a polarizer.
Origin of Iceland spar:
a transparent calcite found in Iceland and used in polarizing microscopes
A transparent form of calcite, used to demonstrate the polarisation of light.
a transparent variety of calcite, the best of which is obtained in Iceland. It is used for the prisms of the polariscope, because of its strong double refraction. Cf. Calcite
Iceland spar, formerly known as Iceland crystal, is a transparent variety of calcite, or crystallized calcium carbonate, originally brought from Iceland, and used in demonstrating the polarization of light. It occurs in large readily cleavable crystals, easily divisible into rhombs, and is remarkable for its double refraction. Historically, the phenomena of this crystal were studied at length by Christiaan Huygens and Isaac Newton. Sir George Stokes also studied the phenomenon. Mines producing Iceland spar include many mines producing related calcite and aragonite as well as those famously in Iceland, productively in the greater Sonoran desert region as in Santa Eulalia, Chihuahua, Mexico and New Mexico, United States, as well as in the People's Republic of China.
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"iceland spar." Definitions.net. STANDS4 LLC, 2014. Web. 25 Jul 2014. <http://www.definitions.net/definition/iceland spar>.