Dodge, Mary Mapes, 1830-1905 · [New York : Scribner & Co.] · leaf 467
atural shapes, it might be inferred that NATURE AND SCIENCE FOR YOUNG FOLKS 274 every gem, as it comes from the mine, or river-bed, or from, wherever it may have been discov-ered, is found in its exact crystal form. How-ever, this is not always the case; sometimes itmay lose its beautiful shape… … 5, RUBY OR SAPPHIRE; li. TOPAZ: 7. EMERALD. sent, or perhaps only 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…
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