This site is regularly updated, which causes Google to report the site is hacked. This is fake news, and Google bots are not intelligent--Donald Kasper 9/15/17.


Semi-precious Stone Identification Using Infrared Spectroscopy
Published 2017, 387pp, Last revision 2017, 8.5 x 11 spiral bound, full color laser printed - by Donald Kasper
The first full book on identifying semi-precious stones in reflectance infrared. Covers faceted stones and shaped stones for jewelry, carving stones, ornamental stones.
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$145.00 (+$15 s/h for U.S.)
White Papers (Position Papers) on Semi-precious Stone Misidentification
Free from Kasper Jasper Press
Some key gemology semi-precious stone misidentifications circulating in June, 2017 
Analysis of China Chrysanthemum Stone showing coesite--a potential impact event? 
Lom, Norway reported pink thulite (zoisite) is epidote, quartz, and trace zoisite 
Composition of snowflake obsidian is sanidine, not cristobalite 
Afghan lapis is mostly diopside, and Chilean lapis is mostly hauyne 
My Afghanistan pargasite is diopside and the tschermakite in zoisite is pargasite 
Mt. Baldy, Cascade canyon lapis analysis with infrared spectroscopy 
Is mariposite a phengite or fuchsite mica? 
Does African pietersite have riebeckite (crocidolite)? 
Is bronzite an enstatite? 
An update identifying the contents of bronzite and tiger's eye 
An infrared identification of White Buffalo (TM)--is this turquoise? 


A Southwestern Field Guide to the Agates, Jaspers, and Opals,
Volume I--The Geology of their Formation, Inclusions, and Structures
Published 2010, Last revision 2014, 464pp, 8.5 x 11 spiral bound, full color laser printed - by Donald Kasper
The author's "magnum opus" (grand work) describing models of genesis of all the agate inclusions. They are studied extensively with a full review of the chemistry of colloidal gel systems.
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$185.00 (+$15 s/h for U.S.)

A Southwestern Field Guide to the Agates, Jaspers, and Opals,
Volume II--A Complete Classification of Species, Inclusions, and Structures
Published 2011, Last revision 2014 (10% larger), 402pp, 8.5 x 11 spiral bound, full color laser printed - by Donald Kasper
While the original classification focused on Southwestern U.S. agates, it has been enhanced to include all agate, jasper, and opal structures worldwide. This also includes a full study of the geodes.
This is a detailed study of all the structures and inclusions seen with the naked eye.
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$160.00 (+$15 s/h for U.S.)

Bundle Discount:
A Southwestern Field Guide to the Agates, Jaspers, and Opals Volume I - by Donald Kasper AND
A Southwestern Field Guide to the Agates, Jaspers, and Opals Volume II - by Donald Kasper (Bundle)
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$300.00 (+$20 s/h for U.S.) (Save $45)

White Papers (Position Papers) on the Geology and Geochemistry of Agates
Free from Kasper Jasper Press
The author's master classification key for the agates, jaspers, opals, and geodes 
The author's quick overview of the data on jasper formation 
Geologic Collecting Sources of Agates in the Southwestern U.S. 
Geochemical Reactions of Agate, Jasper, Opal, and Chert Formation 
Periodic Table of the Agates, Jaspers, and Opals (Elements found in them) 
Agate, Jasper, Opal, Chert, Chalcedony, Flint Definitions 
Lake Superior skip-'n-atom agates--evidence of agate formation in oceanic spilite basalt;


A Field Guide to the Agates, Jaspers, and Opals,
Volume III--A Study and Classification of Agate and Geode Microstructures
Published 2011, Last revision 2014, 202pp, 8.5 x 11 spiral bound, full color laser printed - by Donald Kasper
An extension of the Volume II Field Guide, adding a study of inclusions with 10-40x stereo microscopy. Includes an extensive study of agate and geode inclusions and structures.
Covers geode structures from many Western locales (roughly 60% of the photography)--the first microscopy study of them ever.
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$80.00 (+$10 s/h for U.S.)

Bundle Discount:
A Southwestern Field Guide to the Agates, Jaspers, and Opals Volume I - by Donald Kasper AND
A Southwestern Field Guide to the Agates, Jaspers, and Opals Volume II - by Donald Kasper AND
A Field Guide to the Agates, Jaspers, and Opals Volume III - by Donald Kasper (Bundle)
$360.00 (+$20 s/h for U.S.) (Save $65)

A Field Guide to the Agates, Jaspers, and Opals,
Volume IV--A Microscopy Study of Banded Agates and their Structures
Published 2013, Last revision 2016, 272pp, 8.5 x 11 spiral bound, full color laser printed - by Donald Kasper
A comprehensive study of agate banding systems using stereomicroscopy and polarizing microscopy. Read a description of this book.
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$95.00 (+$15 s/h for U.S.)

A Field Guide to the Agates, Jaspers, and Opals,
Volume V--Specimen and Inclusion Identification Using Infrared Spectroscopy
Published 2013, Last revision 2017, 320pp, 8.5 x 11 spiral bound, full color laser printed - by Donald Kasper
A study of major jaspers, agates, and opals of the world, with a photo of each one scanned in infrared, its graph, and analysis.
Has study of important stuctures and inclusions, and the clays commonly formed in agates.
Provides user the training to identify calcite commonly sold as agate,
and lava rocks commonly sold as jasper. Identifies many current jasper and agate forgeries.
Specimens from major Western U.S. locales are identified. Read a description of this book.
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$125.00 (+$12.50 s/h for U.S.)

The Formation of Thundereggs (Lithophysae)
Published 2010, Last revision 2017, 272pp, 8.5 x 11 spiral bound, full color laser printed - by Robert Colburn
A formidable classic that for the first time took the study of geodes and thundereggs out of the stone age. This work is a summary of the findings based on 50 years of Colburn's mining and study of these structures.
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$125.00 (+$10 s/h for U.S.)

The Formation of Thundereggs (Lithophysae) BLACK-AND-WHITE VERSION
Appendix of color specimens removed, otherwise same as color version
Published 2010, Last revision 2017, 214pp, 8.5 x 11 spiral bound, black-and-white laser printed - by Robert Colburn

$45.00 (+$10 s/h for U.S.)

Geodes and Thundereggs in Rhyolite
Published 2010, Last revision 2014, 418pp, 8.5 x 11 spiral bound, full color laser printed - by Dr. Peter Woerner
The English translation and revision of the German version titled "Achate in Rhyolithkugeln"
The most comprehensive study and classification of geodes and thundereggs ever written.
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$165.00 (+$15 s/h for U.S.)

Bundle Discount:
The Formation of Thundereggs (Lithophysae) - by Robert Paul Colburn AND
Geodes and Thundereggs in Rhyolite - by Dr. Peter Woerner (Bundle)
$245.00 (+$15 s/h for U.S.) (Save $45)

A Geologic and Inclusion Study of the Lake Superior Agates
Published 2011, Last revision 2017, 204pp, 8.5 x 11 spiral bound, full color laser printed - by Donald Kasper
A major work by the author describing this regions' identified agate inclusions and their proposed geochemistry of formation.
Also includes additional study of the clays in the agates.
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$75.00 (+$10 s/h for U.S.)

A Geologic and Inclusion Study of the Northern Mexico Agates
Published 2012, Last revision 2017, 192pp, 8.5 x 11 spiral bound, full color laser printed - by Donald Kasper
A review of agate genesis modelled by the author, a description of this regions' identified agate inclusions, and the regions' geology.
Also includes studies of Southern New Mexico and West Texas sites.
Also includes additional study of the clays in the agates, and a model of basalt-rhyolite formation found in the region.
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$70.00 (+$10 s/h for U.S.)

A Re-investigation of the Metamorphic Agates and Geodes of the Upper Ploczek, Poland
Published 2011, Last revision 2016, 120pp, 8.5 x 11 spiral bound, full color laser printed - by Donald Kasper
The author reviews the Ploczek photo archive, detailing the sericite and chlorite metamorphism captured in these agates.
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$50.00 (+$10 s/h for U.S.)

A Geologic and Inclusion Study of the Fairburn and Dryhead Agates, Jaspers, and Cherts
Published 2012, Last revision 2017, 115pp, 8.5 x 11 spiral bound, full color laser printed - by Donald Kasper
The author reviews the geologic sources of the Fairburn and Dryhead agates, and documents their marine structures as chert-agate nodules.
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$50.00 (+$10 s/h for U.S.)

A Geologic and Inclusion Study of the Keokuk, Iowa, Missouri, and Kentucky Sedimentary Geodes
Published 2012, Last revision 2017, 121pp, 8.5 x 11 spiral bound, full color laser printed - by Donald Kasper
The author reviews the geologic sources of the Iowa and Kentucky sedimentary nodules and geodes, and documents their marine structures.
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$45.00 (+$10 s/h for U.S.)

A Geologic and Inclusion Study of the agates of Coastal California
Published 2014, Last revision 2017, 154pp, 8.5 x 11 spiral bound, full color laser printed - by Donald Kasper
The author reviews the geologic provinces of Coastal and Northern California and their agate occurrences
particularly on the San Andreas, Pope Valley, and Santa Monica faults.
Includes study of Jurassic age Sierra Nevada Mtns front range poppy jaspers.
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$65.00 (+$10 s/h for U.S.)

A Student's Guide to the Genesis of the Agates, Jaspers, and Opals
Published 2011, Last revision 2014, 44pp, 8.5 x 11 spiral bound, full color laser printed - by Donald Kasper
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$15.00 (+$5 s/h for U.S.)

A Student's Guide to the Genesis of the Lithophysae--Geodes and Amygdules
Published 2012, Last revision 2017, 40pp, 8.5 x 11 spiral bound, full color laser printed - by Donald Kasper
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$15.00 (+$5 s/h for U.S.)


A Student Study Guide on Agate and Geode Formation
A more detailed overview of the historical literature, geology, and formation of agates and geodes/thundereggs.
Describes historical errors made in discerning their conditions of formation, and provides a comprehensive, corrected model of formation.
Published 2014, Last revision 2017, 65pp, 8.5 x 11 spiral bound, full color laser printed - by Donald Kasper
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$25.00 (+$5 s/h for U.S.)


True Adventures of the Geode Kid--Part I
Published 2011, Last revision 2014, 204pp, 22 adventures, 8.5 x 11 spiral bound, full color laser printed - by Robert Colburn
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$40.00 (+$10 s/h for U.S.)

True Adventures of the Geode Kid--Part II
Published 2011, Last revision 2014, 192pp, 14 adventures, 8.5 x 11 spiral bound, full color laser printed - by Robert Colburn
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$40.00 (+$10 s/h for U.S.)

True Adventures of the Geode Kid--Part III
Published 2011, Last revision 2014, 222pp, 11 adventures, 8.5 x 11 spiral bound, full color laser printed - by Robert Colburn
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$40.00 (+$10 s/h for U.S.)

True Adventures of the Geode Kid--Part IV
Published 2011, Last revision 2014, 194pp, 14 adventures, 8.5 x 11 spiral bound, full color laser printed - by Robert Colburn
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$40.00 (+$10 s/h for U.S.)

Bundle Discount:
True Adventures of the Geode Kid, Volumes I, II, III, and IV - by Robert Colburn
$140.00 (+$20 s/h for U.S.) (Save $20)


Rebuttal White Papers (Position Papers) on the Geology and Geochemistry of Agates
Free from Kasper Jasper Press
A Rebuttal to the Mineral Inclusions List of Dr. Jenz Goetz, Agates III 
A Rebuttal to the GIA paper on Moroccan agate analysis and their formation, and a rebuttal to Dr. Heaney on moganite 
A Rebuttal to the Proposal of Bacteria Fossils in Geodes by Dr. Jenz Goetz, Agates III 
An overview of the most aggregious myths promoted in popular and scientific literature on agate formation 
Occam's Razor versus Kasper's Razor 

Mindat web site agate discussion and responses from Donald Kasper, Blog of February, 2017 
Mindat web site agate discussion and responses from Donald Kasper, 3 Blogs of August, 2017 
Mindat web site agate discussion and responses from Donald Kasper, 4th Blog of August, 2017 
Mindat web site kambaba/kabamba composition discussion and responses from Donald Kasper, 5th Blog of September 2017 
Mindat web site Lake Superior agate source questions and responses from Donald Kasper, 6th Blog of September 2017 

Russia makes Chalcedony in Supercritical Water, Part I 
Russia makes Chalcedony in Supercritical Water, Part II