Hi. Not natural. Worked ?

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Natural fracturing I think not

Welcome back Baggy, a quick look and I notice small pigment areas in at least one of these, giving a very pleasurable profile description. Even patination vs multiple flake removals is always most likely through agency. I will have a proper look at some point.

Last pic, second stone from the right bottom corner, has a very good face frontal description.i will post a very close match for this face frontal in the portable rock art faces section in a couple of days.