80/20 Cow/Ox/Cattle Gallstones for Sale

Cow /Ox Gallstones for sale for (wholestone / brokenstone ratio is 80% / 20% )
Highest demand is for stones with the following features:

yellow golden orange colour;
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