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. 20 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 Quality and classification Highest demand is for stones with the following features: yellow golden orange color; stones with low specific weight; large stones; bili rubin content not less than 35%; There is a demand for dark stones as well, but prices are considerably lower however Stones are traded in the following specifications 100% whole stones 90% whole stones / 10% broken 80% whole stones / 20% broken 70% whole stones / 30% broken 60% whole stones / 40% broken 100% broken stones 100% ox gall powder. The stones have to 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.