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Updated: May 5, 2025
The green fluor-spar which Haüy called "emeraude de Carthagène" may also be substituted, but the application of the file detects the trick with ease. Some of the green tourmalines approach the emeralds in hue very closely, and by artificial light it is impossible to distinguish them from each other. Fragments of quartz may be stained by being steeped in green-colored tinctures.
At Rose Clare, Ill., a string of shanties three miles below, are two idle plants of the Argyle Lead and Fluor-Spar Mining Co. Carrsville, Ky., is another arid, hillside hamlet, with striking escarpments stretching above and below for several miles. Mammoth boulders, a dozen or more feet in height, relics doubtless of once formidable cliffs, here line the riverside.
It is moreover acknowledged that even those mineral and thermal springs which, in the present state of the globe, are far from volcanoes, are nevertheless observed to burst out along great lines of upheaval and dislocation of rocks. Many of these bodies occur as vein-stones; such as silex, carbonate of lime, sulphur, fluor-spar, sulphate of barytes, magnesia, oxide of iron, and others.
An even more sumptuous material called Murrha was employed, which has been identified with fluor-spar, a translucent crystalline stone marked with blue, red, and purple, similar to the beautiful substance found near Matlock in Derbyshire.
In a mineralogical cabinet, where these substances are preserved separately, you will obtain some notion of their forms. You will see there, also, specimens of beryl, topaz, emerald, tourmaline, heavy spar, fluor-spar, Iceland spar possibly a full-formed diamond, as it quitted the hand of Nature, not yet having got into the hands of the lapidary.
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