Genesis and Clasification of Agates and Jaspers: a new theory


  • 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.
  • Using an innovative geological and stratigraphic approach.
  • Book in english.
  • Pages: 160, Pictures: 459

Availability: In stock

SKU: LIB0001 Category:

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.

About the author:
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.


To ensure that you receive the item in the best condition and as soon as possible, all the books are sent by private courier companies. The waiting time will depend on the location and type of the destination area, but it is estimated that the terms can range between 2 and 10 days. This kind of shipment has a tracking number.

Shopping Cart