I don't know. If it's important to you, ask JB via Agroracom or Tracy.

The photos provided say 4X magnification for whatever that means, and I would assume for pictures taken a shoulder height.

For my part, it doesn't matter. I doubt these would be the skinny roots of mineralization, the tops of which were eroded long ago. More than likely these are the sprinkels on top of the icing on top of the cake (as is suggested by geophysics and an outside consultant).