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. g.—Terebratula. … Fig. 10.—Mammillary Ammonite. and are found in rocks belonging to what has beencalled the primary or palaeozoic period. Those represented by Figs, y, 8, 9, and 10 ap-pertain to the secondary formations, such as the 12 PRECIOUS STONES. oolite or Jurassic formation, named from the JuraMountains, in…
Precious stones · Diamonds · Gems
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