Diamonds and precious stones, a popular account of gems .. . Fig. 6.—Calamité. Fig. 6*.—Lepidodendron of the Coal Formation. from those that exist in the present condition of ourglobe ; and their dominant races, long since extinct, I o PRECIOUS STONES. have furnished names for remote eras,—for all thegeological ages, indeed, included between the azoicage and the age of man. With the high temperature of the igneous forma-tions, life was incompatible; consequently no fossil

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Keywords: ., bookcentury1800, bookdecade1870, booksubjectgems, booksubjectprec