Diamonds and precious stones, a popular account of gems .. (1874)
Dieulafait, Louis, b. 1830, Sanford, Fanchon, tr · New York, Scribner, Armstrong, and Company · leaf 35
.14 and 15 illustrate characteristic types. After the tertiary formation comes the post-ter-tiary or quarternary formation, in which the animalsare quite analogous to those of our own period. If we inquire of chemistry what is the composi- 14 PRECIOUS STONES. tion of the two grand classes of rocks… … Fig. 15.—The Common Anoplotherium. Consequently, stratification y presence and oftenextreme abundance of fossils, ^xt.2X preponderance o{the calcareous element, are the unmistakable char-acteristics of sedimentary formations. Absence ofstratificatio7i, complete absence of fossils, great…
Precious stones · Diamonds · Gems
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