After extracting the gallstones from the cattle,they are 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 approximately 20 degrees Celsius. After full drying the stones are packed in hermetically sealed bags.
Quality and classification
Highest demand is for stones with the following features:
yellow golden orange colour;
stones with low specific weight;
bili rubin content not less than 35%;
There is a demand for dark stones as well, but prices are considerably lower however.The stones have a natural smell of healthy, BSE free cattle. Liver stones, kidney stones, piping, moldy stones, blood stones, cholesterol stones and stones descending from other animals respectively are separated.