656 brilliant pages from the magic world of unique agates and fascinating jasper - a dream of a book. More than 2000 pictures. 9.5 x 11 inches. Hardcover.
The first detailed publication ever on worldwide jasper locations - Wonderful jaspers from the world famous Hans Gamma Collection ˇ World-class jaspers from Oregon, Arizona, Nevada, California and many other US locations ˇ Gorgeous new jaspers from Indonesia ˇ Famous old European jaspers ˇ Colorful jaspers from South Africa, Egypt, Morocco and Madagascar ˇ Beautiful Russian jaspers from the Ural Mountains ˇ Variegated Jaspers from Australia ˇ Jasper boxes from the unique collection of Anton Ulrich, Duke of Saxony-Coburg-Meiningen, etc.
Jens Götze (TU Bergakademie Freiberg/Saxony): The SiO2-system and the definition of agate ˇ Geological occurrences and age of agates ˇ Mineralogy and microstructure of agates ˇ Nomenclature of microcrystalline SiO2 phases ˇ Distribution of SiO2 phases in agates ˇ Microstructure of agates ˇ Agate banding ˇ The formation of the microstructure in agates ˇ The nature of chalcedony "fibers" ˇ Uncommon features and structures in agates ˇ The color of agates ˇ Structural defects in chalcedony and agate ˇ Trace elements in agate ˇ Water in agate ˇ Luminescence studies ˇ Paragenetic minerals in agates ˇ Carbonate minerals in agate ˇ Fe-oxides/-hydroxides in agates ˇ Temperature of agate formation ˇ Fluid inclusion studies Oxygen isotopes ˇ The Al-"thermometer" ˇ Formation of agates in volcanic rocks ˇ The formation of cavities ˇ Sources of SiO2 and transport of silica ˇ Formation of volcanic agates - a model ˇ Vein agates ˇ Agates in sedimentary rocks ˇ Agate formation due to organic processes.
Update on new and old worldwide agate locations ˇ Rare agates from Saxony and Thuringia in Germany ˇ New Indonesian agates ˇ Scottish agate locations update (Lord John Cromartie) ˇ Agates from Agate Creek, Australia (Nick Crawford) ˇ The best agates from Ploczki, Poland.
Another more than 60 top agate, jasper, and petrified wood collectors from all over the world showing their excellent collections.