Need Help Identifying please and Thank You

[BlackHawkMurrietta]

 

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[BlackHawkMurrietta]

I was doing a dump run 5 years ago it was raining and the rain exposed a few cool rocks when I asked him if I can have them he said yes and told me his Dad rented a studio to an old Native American who had 6 chest full of his rock collection over time the chest deteriorated and all rocks are in the dirt now so I brought a bunch of dirt and ended with a ton of cool rocks

 

[BlackHawkMurrietta]

And arrowheads

 

[stdenis_jd]

check it for magnetism - looks to be rich in iron, question is what kind of iron (or is it an iron variant at all)

 

[BlackHawkMurrietta]

Green one is magnetic

 

[BlackHawkMurrietta]

I tested the black one with diamond tester and it beeb as if it were a diamond

 

[stdenis_jd]

Green one is magnetic

possibly magnetite, sounds more likely to be serpentine being that it is magnetic and dark green.