Diamonds and precious stones, a popular account of gems .. . Fig. 5.—Lyells Cephalaspis. Fig. 4.—, Paradoxides bohemicus. b, Phacops latifrons. plants have been left age after age in the sedimentsof the different eras ; these remains are known asFossils. They reveal forms of life very different

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Keywords: ., bookcentury1800, bookdecade1870, booksubjectgems, booksubjectprec