bn:00045752n
Noun Concept
Categories: Wikipedia articles incorporating a citation from the 1728 Cyclopaedia, Carbonate minerals, Polarization (waves), Transparent materials, Christiaan Huygens
EN
Iceland spar  Double-refractory spar  Iceland crystal  Optical calcite
EN
A transparent calcite found in Iceland and used in polarizing microscopes WordNet 3.0
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EN
Iceland spar, formerly called Iceland crystal and also called optical calcite, is a transparent variety of calcite, or crystallized calcium carbonate, originally brought from Iceland, and used in demonstrating the polarization of light. Wikipedia
A transparent crystallized mineral Wikipedia Disambiguation
transparent variety of calcite Wikidata
A transparent form of calcite, used to demonstrate the polarisation of light. Wiktionary
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