Diamonds and precious stones, a popular account of gems .. (1874)
Dieulafait, Louis, b. 1830, Sanford, Fanchon, tr · New York, Scribner, Armstrong, and Company · leaf 32
Fig. 7.—Fossil Dragon-fly of the Secondary Epoch. ever appears, or possibly could appear, in rocks ofthis kind. In sedimentary formations, on the con-trary, such remains abound, and furnish anotherexcellent means of distinguishing them from theigneous rocks. A few illustrations will exemplify types… … Fig. 8.—Turrilites catenata.
Precious stones · Diamonds · Gems
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