Chakotra fruit also known as grapefuit is available in some regions in south and north east side. In India it is known as chakotra. In English it is known as "grapefruit".
There were some homeopathy rumors on this juice being good for the kidney stone patients. However there is not much strong conclusive results on this one.
Oxalates stones are serious and they require proper diet and some medication. So it's better to avoid using such juice for removal of the stone formation. As per 2005's research on this topic, the results are inconclusive. Also some of the stones being not removed and instead increased in it's length shows the study is yet to complete on this front.