Yes - Calcium bentonite. I get it from www.specialclay.com. I believe it did cure me (after the drugs kind of worked but then stopped working). The description by lisasf is basically how I put it on, except I smear, dump, whatever, a handful of the clay onto the gauze, then press that mass against the breast. It forms a kind of pancake against the breast about 1/2 inch thick.
When I first started using it I had a hard mass and one cyst still oozing a bit. I used to change the clay about 3 or 4 times a day. I always wore it. Eventually the oozing stopped. After months the mass began to disappear.
At some point I wore it only part of the day and at night. Now I wear it only at night. My doctors were amazed. I am off the drugs, no pain, no new cysts. On my other computer I have a file where I gathered all my posting about the clay. I will try and remember to send it to you.
But one way to reach many of the clay posts is this: type into Google the following:
clay site:
http://www.medhelp.org/posts/granulomatous-mastitis/
You will get many of the postings. Good luck! I wish everybody in this group would give this a try. I was desperate. The reason I stuck with the clay (kind of a nutty thing to do) was that I noticed that as long as the clay was against my breast, the pain was very much reduced. And for me that was everything.