Metal shavings or just sand?

[kolosy]

Pulling this out into a separate post because I *would* like another set of eyes on it.

Changed the oil on this car for the first time. It’s about 2k miles and 4 track days since the last one. I had a blackstone analysis done when I upgraded the oil cooler and it came back with elevated aluminum and silicone. Car had wpc treated bearings put in about 30k miles ago. The filter looks like this throughout — black specs that might be sand and these silvery looking ones. They aren’t ferrous.

Is this all sand / dirt or do I have an issue here?

[Bmwdeven]

That looks damn good compared to the first time I changed my oil after purchasing my car 💀

[Helmsman]

Can't see what the particles are really but sand? Except for bearing shavings the only other thing could be peeling from the valve cover. Doesn't look like either though.

[M3SQRD]

It doesn’t look metallic to me and, as Helmsman stated, it’s definitely not sand. I also agree that it doesn’t look like it came from the coating on the magnesium VCs.