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Magic Stones and Electric Gems: Europe

In medieval Europe this mineral was greatly valued for its therapeutic virtues. Trotula, the first of the female physicians connected with the celebrated School of Salerno, the centre of medical culture in Europe in the Middle Ages, and who wrote a treatise on female diseases, recommended the use of the loadstone in childbirth. The stone was to be held in the right hand, and the learned lady asserted that the wearing of a coral necklace would aid its beneficent effect. Both these substances are prescribed for this use by the Oxford teacher, John Gadesden (1300), in his "Rosa Anglica." Francisco Piemontese, who taught in Naples about 1340, also recommends the loadstone, but he directs that it be strewn with the ashes obtained by burning the hoof of an ass or a horse; according to this last authority, the stone should be held in the left hand.

That wounds caused by burning could be healed if powdered loadstone were sprinkled over them was confidently taught even in the seventeenth century. However, some ill effects were occasionally remarked when the substance was used medicinally, for it sometimes produced melancholia. In this case an antidote was found in the emerald, and we are assured that if a solution made from this stone were taken thrice a day for nine consecutive days, the melancholia would pass away.