
ID needed for this non-reactive, soft, white/ light green rock found along southern Lake Michigan, USA.
I’ve posted this rock in several other places and not gotten anywhere. I found it along Lake Michigan near Kenosha, Wisconsin USA. This is it cut in half. I saw at least a half dozen others of the same apparent type. It’s soft, judging by the ease of cutting with my saw I’d put it at a 3-4, about the same as limestone. The green bits are softer than the white. When I scrape it with a nail it really digs into the green bits. Vinegar splashed onto a freshly scratched line has no reaction.
Thanks for your help.