Fuller's Earth?

I've seen many old manuals refer to Fuller's Earth as a way of removing grease stains.  

from wiki

Fuller's earth consists primarily of hydrous aluminum silicates (clay minerals) of varying composition.[1] Common components are montmorillonite, kaolinite and attapulgite. Small amounts of other minerals may be present in fuller's earth deposits, including calcite, dolomite, and quartz. In some localities fuller's earth refers to calcium bentonite, which is altered volcanic ash composed mostly of montmorillonite.

Is it organic or better?  Is it non-toxic?

60-70 years ago Fullers Earth was a common thing for a housewife to have in her kitchen. It's my understanding that it's been used for centuries. I can recall my mother using it to help remove grease stains from cloth items and felt hats. Back then, Fullers Earth was very fine clay. What the composition is nowadays I don't exactly know, but it's still ultra fine clay of some sort. Since it is used in veterinary medicine for certain problems, plus used in certain skin preparations, I would venture to say that it isn't toxic. Is it organic? In the modern USDA sense, no, because it doesn't fit the legal definition of something being grown or produced under organic guidelines. So you can't have organic kitty litter or Fullers Earth by US law.