Iceland spar

noun

Definition of Iceland spar

: a birefringent transparent colorless variety of calcite

First Known Use of Iceland spar

1771, in the meaning defined above

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The first known use of Iceland spar was in 1771

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Cite this Entry

“Iceland spar.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/Iceland%20spar. Accessed 17 January 2020.

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