What Is Bentonite Clay? And How Do I Use It? | Ultimate ...
Sep 19, 2018 · Bentonite clay is formed from the glass particles found within volcanic ash. This clay is found in rocks deposited from approximately 488 to million years ago. The name "bentonite" was derived from Fort Benton, the city near which it was discovered in the United States. Bentonite is primarily composed of smectite clay minerals.