Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 467
traces of them left, thecrystallographer will be able to recognize thegem. Now the shapes of the crystals of semi-preciousor precious stones are particularly important,because some of their other properties are oflittle use to us in the recognition of the gem.Take, for example, color; it might be… … 8, ROCK-CRYSTAL; 9. ROCK-SALT: 10, MICA; 11, SULPHUR. yellow or brown, or a yellowish-brown color;but it is often found perfectly colorless, alsopale blue and deep wine-color. Again, the garnet may be of every shade ofred, of several very beautiful shades of green,also orange-color, brown, and even…
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