Dear friends, none stone except pure cholesterol stone ( which is not so common), are dissolved by any medicine , whether allopathy, homeopathy or aurvedic. It is myth and wrongly publicized. Actually , small stone keep on flushing itself out of kidney naturally, whether you take any medicine or not. Yes, if you take more water , it can happen faster. However, if stone size is bigger than narrowest portion of ureter, it can obstruct it. If obstruction persist beyond 10 days or it is causing unbearable pain not responding to medicine , then it require surgical intervention.  In your case, a single stone of about 9 mm is present which is less likely to pass without causing obstruction. Presently, it is silent and not causing any harm. So, better to wait and watch. If it stucks, surgery should be done. Meantime, keep on following general guidelines of taking more fluids, more citrus fruits after meal, less salt and moderate proteins in your diet , so that it should not  grow further.