Try Hulda Clark
I think no hard stones can get out from GB with out relaxing your bile ducts. Gold coin grass can't "brake" the stones as someone would like to say. If GCG could do that it would be realy a medical sensation and no FDA or Medical community could hide that.
I believe some herbs can help some chemical reactions in the Liver but not in the GB. This simple makes sense.
All you can do is use malic acid for 5 days, relax the bile ducts with Magnesium (magnesium sulfate) and push it with oil.
You probably have black calcifed stones in the GB and they are hard to get out.