Duffin, C.J. (2006): Stones for the Stone: minerals and fossils in the treatment of renal calculi. Pharmaceutical Historian, 36 (4): 56-60. [Nephrite jade amulet used to protect against renal problems]
Duffin, C.J. (2008): Fossils as drugs: pharmaceutical palaeontology. Ferrantia, 54: 1-83 [Fossil fish teeth as protection against poisons and various diseases; amber amulets against various diseases]
Duffin, C.J. (2013): History of the external pharmaceutical use of Amber. Pharmaceutical Historian, 43 (3): 46-53. [Amber amulets against various dseases]
Duffin, C.J. (2023): Convulsion Keys: Folk medicine amulets of the Austro-Bavarian region. Pharmaceutical Historian, 53 (3): 79-83. [Key amulets to protect against childhood fevers and epilepsy]
Duffin, C.J. (2020) : Medicinal Quartz : Crystallus or Rock Crystal. 162-204 In Barroso, M. Sameiro do, Duffin, C.J. & Sousa, G. de (eds.): Medical Heritage of the National Palace of Mafra. Cambridge Scholars: Cambridge. [Rock crystal amulets to help in childbirth]
Pymm, R.J. & Duffin, C.J. (2020): Dragonstones: Myth, Magic, Medicine and Material Culture. 205-256 In Barroso, M. Sameiro do, Duffin, C.J. & Sousa, G. de (eds.): Medical Heritage of the National Palace of Mafra. Cambridge Scholars: Cambridge. [Stones used amuletically to protect against poisons]
Duffin, C.J. (2018): Amber as a component of palaeontological pharmacology. 95-132 In Polyakova, I., Duffin, C.J. & Suvorova, T.J. (eds.) Amber in the history of medicine: Proceedings of the International Conference. Kaliningrad: Kaliningrad Regional Amber Museum [dated 2016]. [Amber and other geological materials as amulets against a variety of diseases]
Duffin, C.J. (2019): Snakes’ tongues, Serpents’ eyes and sealed earths: Geology and Medicine in Malta. Occasional Papers of the St John Historical Society: 1-16. [Fossil shark and fish tooth amulets against various diseases]
Duffin, C.J. (2022): The Emerald: a magico-medicinal stone. 81-178 In: BARROSO, M. do S., DUFFIN, C.J. & MARTINS E SILVA, J.A. (eds.): Insights into Portuguese Medical history: From the Birth of the Art of Asclepius. Newcastle upon Tyne: Cambridge Scholars Publishing. [Emerald amuletic jewellery]
Duffin, C.J. (2010): The Toad Stone – a rather unlikely gem. Jewellery History Today, Issue 8 (Spring 2010): 3-4. [Amuletic use of fossil fish teeth set in rings – protection against poisoning]
Duffin, C.J. (2012): Natternzungen-credenz: tableware for the Renaissance nobility. Jewellery History Today, Issue 14 (Spring 2012): 3-5. [Fossil sharks’ teeth used to protect against posioning]
Duffin, C.J. (2017): Fossil shark’s teeth as alexipharmics. 126-133 In Wexler, P. (ed.) Toxicology in the Middle Ages and Renaissance. 174pp. London: Academic Press. [Fossil sharks’ teeth used to protect against poisoning]
Duffin, C.J. (2022): Combating the Plague: Apotropaic Jewellery. Jewellery History Today, Issue 44 (Spring 2022): 8-9. [Amuletic use of various materials mounted in items of jewellery to give protection against plague]
Duffin, C.J. (2009): Herbert Toms and the Geological Folklore of Sussex. In Brook, A. (ed): What on Earth is under Sussex A Series of Essays Exploring the History of Geology in Sussex. West Sussex Archives Society. Journal of West Sussex History, 77 (2008-09): 57-64. [Amuletic use of fossil echinoids and sponges as lucky stones and to protect against lightning and various diseases]
Duffin, C.J. & Davidson, J. P. (2011): Geology and the Dark Side. Proceedings of the Geologists’ Association, 122 (1): 7-15. [Amuletic uses of various fossil materials against disease, lightning and as lucky stones]
Duffin, C.J. (2011): Herbert Toms (1874-1940), Witch stones, and Porosphaera beads. Folklore, 122 (1) (April 2011): 84-101. [Holed flints (hag stones) and fossil sponges as amulets against evil influences, protection against diseases and as lucky stones]
Gregorová, R., Bohatý, M., Stehlíková, D. & Duffin, C.J. (2020): "Crapaudine" (Scheenstia teeth) – the jewel of Kings. Acta Musei Moraviae - Scientiae geologicae, 105 (2): 277-294. [Discussion of the possible amuletic significance of fossil fish teeth mounted in a 14th century crown]

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