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Collection of a Toadstone, illustrated in Hortus Sanitatis, published in Mainz in 1491. Borax-Krotenstein1.jpg
Collection of a Toadstone, illustrated in Hortus Sanitatis , published in Mainz in 1491.
Lower jaw fragment of Scheenstia, showing the teeth in situ Scheenstia lower jaw.jpg
Lower jaw fragment of Scheenstia , showing the teeth in situ

The toadstone, also known as bufonite (from Latin bufo , "toad"), is a mythical stone or gem that was thought to be found in the head of a toad. It was supposed to be an antidote to poison and in this it is like batrachite, supposedly formed in the heads of frogs. Toadstones were actually the button-like fossilised teeth of Scheenstia (previously Lepidotes ), an extinct genus of ray-finned fish from the Jurassic and Cretaceous periods. They appeared to be "stones that are perfect in form" and were set by European jewellers into magical rings and amulets from Medieval times until the 18th century. [1]



From ancient times people associated the fossils with jewels that were set inside the heads of toads. The toad has poison glands in its skin, so it was naturally assumed that they carried their own antidote and that this took the form of a magical stone. They were first recorded by Pliny the Elder in the first century.

According to Paul Taylor of the London Natural History Museum:

Like tonguestones, toadstones were considered to be antidotes for poison and were also used in the treatment of epilepsy". As early as the 14th century, people began to adorn jewelry with toadstones for their magical abilities. In their folklore, a toadstone was required to be removed from an old toad while the creature was still alive, and as instructed by the 17th century naturalist Edward Topsell, could be done by setting the toad on a piece of red cloth.

Toadstones from Jurassic sediments in Oxfordshire UK Various toadstones.jpg
Toadstones from Jurassic sediments in Oxfordshire UK

The true toadstone was taken by contemporary jewellers to be no bigger than the nail of a hand and they varied in colour from a whitish brown through green to black, depending on where they were buried. [2] They were supposedly most effective against poison when worn against the skin, on which occasion they were thought to heat up, sweat and change colour. [3] If a person were bitten by a venomous creature a toadstone would be touched against the affected part to effect a cure. [4] Alternatively Johannes de Cuba, in his book Gart der Gesundheit of 1485, claimed that toadstone would help with kidney disease and earthly happiness. [5]

Loose toadstones were discovered among other gemstones in the Elizabethan Cheapside Hoard and there are surviving toadstone rings in the Ashmolean Museum and the British Museum.

Allusions in literature

The toadstone is alluded to by Duke Senior in Shakespeare's As You Like It (1599), in Act 2, Scene 1, lines 12 to 14:

Sweet are the uses of adversity;
Which, like the toad, ugly and venomous,
Wears yet a precious jewel in his head.

In James Branch Cabell's short story "Balthazar's Daughter" (collected in The Certain Hour) and its subsequent play adaptation The Jewel Merchants, Alessandro de Medici attempts to seduce Graciosa by listing various precious jewels in his possession, including "jewels cut from the brain of a toad".


Some toadstones were used in jewelry, including on a crown held at Aachen Cathedral used to coronate Charles IV, Holy Roman Emperor. [6]

See also

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  1. "Fossils: myths, mystery and magic". Independent UK. 12 February 2007. Archived from the original on 27 April 2008. Retrieved 13 April 2008.
  2. Thomas, Nicols (1652). "xxxvi". A Lapidary, Or, the History of Pretious Stones: With Cautions for the Undeceiving of All Those That Deal With Pretious Stones. Vol. II. Thomas Buck. pp. 158–159. OCLC   8187470.
  3. Scribonius, Adolf Wilhelm (1631). Naturall Philosophy: or a Description of the Vvorld, and of the Severall Creatures Therein Contained. Tho. Cotes, for Iohn Bellamie. OCLC   216883672.
  4. Thomas, Lupton (1576). A Thousand Notable Things, of Sundry Sortes: Whereof Some Are Wonderfull, Some Straunge, Some Pleasant, Diuers Necessary, a Great Sort Profitable, and Many Very Precious. Imprinted for Edward White. OCLC   1127498887.
  5. Campbell, Marian (2009). Medieval Jewellery in Europe 1100-1500. V&A Publishing. p. 33. ISBN   9781851775828.
  6. Gregorová, R., Bohatý, M., Stehlíková, D., Duffin, Ch., 2020: “Crapaudine” (Scheenstia teeth) - the jewel of Kings. – Acta Musei Moraviae, Scientiae geologicae, 105, 2, 277–294 (with Czech summary).

Further reading