serpentine and talc . It occurs interlayered with chlorite , biotite and phlogopite. Vermiculite clays are weathered micas in which the potassium ions between the molecular sheets are replaced by magnesium and iron ions." view my blogs - http://serpentrioarquila.blogspot.com/ http://themuseletters.blogspot.com/ "Why, then, don't you act when you see the danger of