https://en.wikipedia.org/wiki/Diatomaceous_earth

and then there is a link at the bottom of the page (see previous post)...to diatomaceous earth and 'diatoms'....some interesting imagery, here - dazzlenation....go figure:

 

'blue lips' anybody?....see images taken from google maps/previous posts, regarding 'all of that'....go figure:

 

...and there's another link at the bottom of the above page...to fuller's earth...remember the 'fuller's field' at that church in Thorpe-le-soken....rimington had told the MI5 Russian course, in 1980...that we would all be buried there, eventually...outside of the graveyard boundary...and I was to ask her 'why'...because as far as I could remember....the 'fuller's field' had been where jews used to be buried....go figure:

https://en.wikipedia.org/wiki/Fuller%27s_earth

"Decontamination: Fuller's earth is used by military and civil emergency service personnel to decontaminate the clothing and equipment of servicemen and CBRN (chemical, biological, radiological, nuclear) responders who have been contaminated with chemical agents."