Batrachite
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Batrachites were gemstones, supposedly found in frogs, to which ancient physicians and naturalists attributed the virtue of resisting poison. They resembled frogs in color.
Toadstone is a similar mythical stone, supposed to be found in toads.
The term batrachite is also used for a batrachian (or frog) fossil.
References
This article incorporates text from a publication now in the public domain: Chambers, Ephraim, ed. (1728). Cyclopædia, or an Universal Dictionary of Arts and Sciences (1st ed.). James and John Knapton, et al. {{cite encyclopedia}}: Missing or empty |title= (help)
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- "Batrachite" [dead link]. Oxford English Dictionary. URL accessed 2006-03-05.