calcspar

Neither does Mr. Rosales's theory account at all for auriferous lodes; which below water level are composed of a solid mass of sulphide of iron with traces of other sulphides, gold, calcspar, and a comparatively small percentage of silica.

Getting Gold: a practical treatise for prospectors, miners and students

At a mine of which I was managing director the lode was almost entirely composed of sulphide of iron, carbonate of lime or calcspar, with a little silica.

Getting Gold: a practical treatise for prospectors, miners and students

Thus calcspar is in the 2nd, or hexagonal, whilst aragonite is in the 4th, the rhombic, system, yet both are the same substance, viz.: -- carbonate of lime.

The Chemistry, Properties and Tests of Precious Stones John Mastin

Care should be taken that only a small portion of the mineral is used, and also but little acid; the action should be observed, and is frequently a characteristic, in the case with calcspar, which effervesces while dissolving.

Scientific American Supplement, No. 344, August 5, 1882 Various

It occurs as marble, limestone; calcspar, dogtooth spar, nail head spar, stalactites, and a number of other forms, which are only valuable when occurring in perfect crystals or uniquely set upon the rock holding it.

Scientific American Supplement, No. 344, August 5, 1882 Various

The calcspar is extremely abundant at Bergen Hill, where it might be mistaken for many of the other minerals which I describe as occurring there, and even in preference to them, to one's great chagrin upon arriving home and testing it, to find that it is nothing but calcite.

Scientific American Supplement, No. 344, August 5, 1882 Various

Besides these, its specific gravity is 2.8, hardness, 8.5; from calcspar it cannot be distinguished except by chemical analysis, as the two species blend almost completely with every intermediate stage of composition into either calc spar, or, what occurs in this locality, aragonite, similar in composition to it, or dolomite.

Scientific American Supplement, No. 363, December 16, 1882 Various

The sirupy liquid thus obtained is then mixed with 80 to 100 grammes of pulverized calcium carbonate (calcspar), dried for fifteen minutes at 40 to 60° C., and after standing for one to two hours the dish and its contents are weighed.

Scientific American Supplement, No. 315, January 14, 1882 Various

"Chrismus!" rang from the roof, scintillating with calcspar;

'way Down In Lonesome Cove 1895 Mary Noailles Murfree 1886