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 *5%;

There is a demand for dark stones as well, but prices are considerably lower however.
Stones are traded in the following specifications:

    **0% whole stones
    *0% whole stones / *0% broken
    *0% whole stones / *0% broken
    *0% whole stones / *0% broken
    *0% whole stones / *0% broken
    **0% broken stones
    **0% ox gall powder