[Sca-cooks] Gems preventing poisoning

[Suey]

    On diamonds, Emilio wrote that as they were not polished properly 
until the 1450's he believes them an error but the original source turns 
out to be Juan de Encina who wrote this between 1439-1440 and mentions 
them twice in the text on Suero de Quiñones jousting tournament.
    Got a gem of a gem today - "galicio". There was an area in Turkey 
today called Galicia and there is that of Spain. I find no scientific 
name for this. It comes from Encina as well. Does anyone have any idea 
what this could be? I cannot even fathom a color for it. 'It freed 
eaters of poisonous foods and other misfortunes that could occur while 
eating.'
Suey