CAMPOS-VENUTI, M. (2012): Genesis and Classification of Agates and Jaspers: A New Theory. -Printed by Tipografia Luciani, Rome, 160 pgs.
Carlson, M. (2002): The Beauty of Banded Agates. -Fortification Press, 160 pgs.
CHROMARTIE, JACKSON, PABIAN & TANDY. (2006): Agates: Treasures of the Earth, Firefly Books, New York, 184 pgs.
CROSS, B. (1996): The Agates of Northern Mexico. – Burgess International Group, 201 pgs.
GAMMA, H. (2011): Picture Jaspers, Treasures of the Owyhee area, Oregon. Private Edition, 76 pgs.
HURST, J. (2012): Dryhead Agate Treasures.-Schatz- Kammerachate Publishing, Boulder, Colorado, 90 pgs.
MARSHALL, J. (2009): The Other Lake Superior Agates Llao Rock Publications, Beaverton, Oregon, 176 pgs.
MAYER, D. (2013): Exquisite Agates.-(Bode) 424 pgs
PABIAN, R.K.; ZARINS, A (1994): Banded Agates Origins and Inclusions. -Circular n. 12, Nebraska (University of Nebraska). 32 pgs.
Weight, H. (1948): Eagletails. -Desert Magazine ZENZ, J. (2005): Agates. Haltern (Bode), 656 pgs.
ZENZ, J. (2009): Agates II. Haltern (Bode), 656 pgs.
ZENZ, J. (2011): Agates III Haltern (Bode), 656 pgs.