Diamonds and precious stones, a popular account of gems .. . Fig. 3.—Structure of Sedimentary Rocks. example of sedimentary rock, and it shows verydistinctly the regularity of structure which theserocks usually display. Beyond this general distinction there is another, GEOLOGICAL POSITION. less prominent perhaps, but quite as definitelymarked. The remains of myriads of animals and.

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Keywords: ., bookcentury1800, bookdecade1870, booksubjectgems, booksubjectprec