Bob has shared the following insight with me:
Eventually one learns that Nature produces these things!
If you get 'Haze' particles, you will include micrometeorites, lightning produced ones and output from extremely energetic systems that have a lot of turbulence - such as, coal fired power stations.
It is the co-location with produced carbon and other cluster synthesised elements that is the point. Iron crenelated sphere in centre - all of the background is basically Zinc Oxide - so good contrast.

On BSD full, you can really see the contrast

and on the close up, you can really see the accretion band of carbon mostly - you see this on many of them, this cannot be contamination.

Note our replication of Matsumoto's carbon film AND his lower left one showing the iron ball - at the end of the pools of carbon there is the Iron Rich crenelated spheres - all over the place.

This is a HUGE image, you can again see the synthesised material orbiting around the Fe + O ball (see top right), on the lovely contrast of the Zinc Oxide substrate.

On the middle line to the right, you can see where an Fe + O ball has been lost but you can still see the 'Hook' of the orbiting material.

On the Bottom right, you can see another, well embedded in the material it carried with it, with material orbiting around its equator as the material froze out, it even has a sattellite.

In these examples, the materials are orbiting clockwise.
Bob