calc-spar

American  

[kalk-spahr] / ˈkælkˌspɑr /

Or calcspar

noun

1. calcite.

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Etymology

Origin of calc-spar

1815–25; < Swedish kalkspat calc-spar; t > r by association with spar ³; see calc-

Example Sentences

The latter advantage, however, occurs only when the difference between the indices of refraction for the ordinary and extraordinary rays in the particular crystal made use of is greater than in calc-spar.

From Scientific American Supplement, No. 441, June 14, 1884. by Various

But calc-spar, showing itself in a vena profunda, if it disappears a little lower down is not a good indication; for it did not belong to the vein proper, but to some stringer.

From De Re Metallica, Translated from the First Latin Edition of 1556 by Agricola, Georgius

Dog-tooth Spar, a form of mineral calcium carbonate or calc-spar found in Derbyshire and other parts of England, and named from a supposed resemblance of its pointed crystals to a dog's tooth.

From The New Gresham Encyclopedia Volume 4, Part 1: Deposition to Eberswalde by Various

Ar�gentine, a silvery-white slaty variety of calc-spar, containing a little silica with lamin� usually undulated.

From The New Gresham Encyclopedia. Vol. 1 Part 2 Amiel to Atrauli by Various

It is usually whiter than the Headon limestones, and the fossils occur as casts, the shells being sometimes replaced by calc-spar.

From The Geological Story of the Isle of Wight by Hughes, J. Cecil