After extracting the gallstones from the Ox, cow, cattle's
intestines they have to be washed thoroughly with cold water to
remove blood clots, impurities etc. After washing they are dried
for two to three weeks in a dark and well ventilated environment at
a temperature of approx. *0 degrees Celsius. The stones have to be
moved regularly for better drying and to avoid them sticking at
each other. After full drying the stones are packed in hermetically
sealed bags
