1. The title refers to a type of calcite named Iceland Spar . 2. It is presumed to be the Helgusta Iceland Spar Mine, along Reydarfjordur. 3. Iceland spar , a variety of clear calcite, occurs in Hoffellsfj�ll mountains.4. An object viewed through Iceland spar appears as two because of double refraction. 5. Iceland spar was much used in optical instruments until replaced by synthetic material.6. A transparent variety called " Iceland spar " is used for optical purposes. 7. That novel also prominently discusses the birefringence of Iceland spar , an optical phenomenon that Gibbs investigated. 8. William Nicol ( 1770 1851 ) invented the first polarizing prism, using Iceland spar to create his Nicol prism. 9. His discoveries and mathematical deductions, building on experimental work by double-refraction property of Iceland Spar , or calcite. 10. The album's opening song, " Iceland Spar ", starts the journey by the sun rising at the beginning of the day.
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