Genesis and Classification of Agates and Jaspers: a New Theory
by
Marco Campos-Venuti
in
English
Deciphered one of the biggest mysteries of geology!
A guide to the collector.
A Bible for the geologist.
This book shows a new geological model that explains the formation of most of the microcrystalline and amorphous varieties of silica. It has been written for the collectors, the geologists and for the curious, analyzing many collectible varieties of jaspers, agates and chalcedonies. The use of a geological and stratigraphic innovative approach to the theme, leads to the consequence that most of the concepts are original. Jasper and Chalcedony result to be two silica polymers.
Jasper and Chalcedony are two silica polymers. They are formed as concretions in surface rocks. This leads that silica varieties take their origin in a meteoric environment with a strong influence due to the weather and the alternation of dry and wet seasons. Uncountable situations are possible due to the many parameters as the host rock, the pH of the water and the latitudes, that explain the numerous existing varieties of silica. Explication of the involved phenomena is ruled out with the help of an endless number of pictures and diagrams that capture and maintain the attention of the reader.
The author born in 1965. Is a PhD volcanologist and editor of the Rivista Gemmologica Italiana. Since his childhood he is a passionate collector of stones, and was always curious to investigate their origin. He has an important collection of agates and jaspers and has written innumerable scientific papers.
YOU WILL FIND ALL THE ANSWERS ABOUT:
AGATES
Genesis of the first chalcedony layer
Origin of mosses and plumes
Formation of bands
Primary and secondary colors
Connective channels and interruptions of the bands
Horizontal and concentric banding
Quantitative analysis
Morphology of the bands
Stratigraphy of a banded agate
Influence of climatic conditions
Types of agate depending on host rock
Origin of colored chalcedony without bands
Banded agates without the first chalcedony layer
Lace and Beacon Agates
JASPERS
Classification of Jaspers
Flints and abyssal jaspers
Genesis of orbicular jaspers
Precursors of jaspers
Thunder egg formation
Orbed jaspers
Brecciated jaspers
Jasp-agates
Chemical disequilibrium between jasper and chalcedony
Classification of non-crystalline silica
You can have your copy signed by the author for free. Just ask.
More info at AGATESANDJASPERS(dot)COM
!!!!!!!!!!!!!!!!!IMPORTANT!!!!!!!!!!!!!!!!
The book will be shipped without tracking because of high cost of fast shipping with tracking. Shipping with tracking is 24 euro (=30 dollars) and without tracking is 8.5 euro (=10 dollars). Because I will pay the shipping, your book will be shipped without tracking.
This
shipping will probably last more than 1 month
. So you need to be patient and wait it at home. Don't worry, it will arrive at destination. I shipped more than 500 copies of the book and no one has been lost. Few of them has lasted more than 1 month, but the majority around 3 weeks. Please be patient and sorry in advance.
Per photos, auction is for this RARE U. S. Geological Survey Bulletin 944-c, published in 1947, "
GEOLOGY & ORE DEPOSITS OF BOISE BASIN IDAHO" The book has 319 pages, numerous fold out maps, & an additional 10 maps in a pocket attached to the back cover. Per photos, 10 - 12, 9 of those maps are folded 2 or 3 page mine diagrams, but per photo 2, one is a large color map detailing the geology & showing the towns & major mines of the Boise Basin. This book is in good, lightly read condition, & there are no missing, torn, or otherwise damaged pages.
There has been a recent reprint of this original edition, but the reprint does not have the wonderful & very useful maps! I could not find any of the original editions with an online search today.
From a Non-smoking household, and this item does not have any mildew or mold odors.
I ship within 24 hours of payment, except my local post office is closed on weekends.
I will combine shipping, to save you money, on all items purchased within the same 7-day period. Just let me know?
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I value and respect my customers and will definitely work with buyers to make sure everyone is pleased.